The company Sport Box d.o.o., in collaboration with the club SRK Alba are organizing the seventh edition of 100 Miles of Istria ultra-trail race, a partial self-sufficiency mountain trail running race in a low-mountain environment.

The 100 Miles of Istria Ultratrail race is a running race that takes place along paths in Istria with five different courses:

  • RED: 100 miles Of Istria Ultra Trail: The race starts on Friday, April  12th from Labin. Maximum time: 46 hours. Each finisher will be awarded 6 ITRA/UTMB qualification points and with WSER qualification.
  • BLUE: 110 km of Istria Ultra Trail:  The race starts on Friday, April 12th from Lovran. Maximum time: 30 hours. Each finisher will be awarded 5 ITRA/UTMB qualification points.
  • GREEN: 67 km of Istria Trail: The race starts on Saturday, April 13th from Buzet. Maximum time: 15 hours. Each finisher will be awarded 3 ITRA/UTMB qualification point.
  • YELLOW: 41 km of Istria Trail: The race starts on Saturday, April 13th from Motovun. Maximum time: 8 hours. Each finisher will be awarded 2 ITRA/UTMB qualification points.
  • Kids race. The race starts on Sunday, April 14th in Umag.

To be completely aware of the length and the specificity of the event and to be perfectly prepared for it.

  • To have acquired, prior to the race, a real capacity for self-sufficiency in the mountains which permits the management of problems induced by this type of course, and notably:
  • To know how to face, without outside help, climatic conditions which can become very difficult due to the microclimate conditions (night, wind, cold, fog, rain or snow)
  • To know how to manage, even if one finds oneself isolated, physical or mental problems arising from high fatigue, digestive problems, muscular or joint pain, minor ailments…
  • To be fully aware, that it is not the role of the organization to help a runner to overcome these problems and that for such an activity in nature, security depends upon the capacity of the runner to adapt to the problems encountered, or envisaged.

These races are open to anyone, man or women, born in 1999 or before (categories hopefuls to veterans), club member or not.

The participants born between 1999 and 2001 may only participate in presenting a parental consent, and they may only apply to the following races: YELLOW or GREEN.

Each runner declares their knowledge of and accepts the present regulations and agrees to accept them without reserve and to promote the event’s ethical charter available at

The individual principle of racing in semi-autonomy is the rule.

Semi-autonomy is defined as having the capacity to be autonomous between two refreshment points, not only on the food front but also that of clothing and security, being able to adapt oneself in particular to problems encountered or envisaged (bad weather, physical problems, injuries…).

This principle is implicated in the following rules:

  • Each runner must have all of his/hers obligatory equipment with him/her at all times during the race. He/She carries this equipment in a pack presented at the race-bib distribution and it must not be changed during the course. At any time during the race, the marshals can verify the bag and its contents. The runner is obliged to accept these controls in a friendly manner, at the risk of exclusion from the race.
  • Refreshment points have been supplied with food and beverages to consume on the spot. Only plain water (excluding other drinks) is destined for water bottle or bag replenishment. Each runner must make sure to have, upon leaving each refreshment point, the quantity of water and food necessary for them to reach the next refreshment point.
  • Personal assistance is only tolerated at some aid stations (Plomin luka, Poklon, Buzet, Butoniga and Oprtalj), in the zone specifically reserved for this purpose and with the agreement of the head of the post. This assistance can only be assured by one single person carrying one bag of a maximum 30 liters volume. The remainder of the refreshment point is strictly reserved for the runners.
  • It is forbidden, to be accompanied or agree to be accompanied during all or any part of the race by a person not enrolled, outside the tolerance zones indicated close to the refreshment posts.

Participation in the 100 Miles of Istria ultra-trail race assumes the acceptance of the present regulations and ethics of the race which are available at

  • RED

100 miles of Istria Ultra Trail: 600

  • BLUE

110 km of Istria Ultra Trail: 600


67 km of Istria Trail: 600


41 km of Istria Trail: 600

  • Kids race: 200
  • TOTAL 2.600

A number of delimited places are reserved for: our partners, the international elite (based on the ITRA’s performance index), 2018 winners and certain journalists (who are reporting from within the race), as well as certain volunteers who are very active.

Concerning the recognition of high caliber athletes and also for the fair management of registration, we reserve places for elite athletes, who make the request, according to strict criteria based on the ITRA performance index.

All requests for registration must reach us by email ( before December 31st, 2018.

FREE REGISTRATION >870 >770 >820 >720

Runners who correspond to the criteria can benefit from the registration conditions.

Registration for elite athletes is not automatic, each one must finalize their registration themselves.

Registration procedures

The pre-registration starts on August 1st, 2018 and closes on February 28th, 2019 unless the maximum number of participants in total has already been reached. Keep in mind that the registration is considered finished only upon successful payment.

  • RED: 100 miles of Istria Ultra Trail: until February 28th, 2019 140€
  • BLUE: 110 km of Istria Ultra Trail: until February 28th, 2019 110€
  • GREEN: 67 km of Istria Trail: until February 28th, 2019 70€
  • YELLOW: 41 km of Istria Trail: until February 28th, 2019 60€
  • Kids race: gratis

Keep in mind that the registration is finished only upon payment.

Registration fees can be paid by bank transfer.


52420 BUZET,

IBAN: HR7023600001102441067 -ZAGREBAČKA BANKA D.D.


The registration fees include the following:

  • a race bib
  • assistance and refreshments along the race route
  • race pack
  • a food voucher on arrival
  • a start pack gift
  • a finisher’s medal

The registration for any of these races is firm and final and it is not possible to change races unless being communicated with the organizer.

Any person can at the moment of their enrolment subscribe to the cancellation guarantee, averaging an additional charge of 10 € per person to add to enrolment fees on the same payment.

The object of the guarantee is to enable reimbursement of the fees incurred for the enrolment to one of the four races in the case where a runner asks to cancel his enrolment because of the following events:

  • an accident, a serious illness or the death of the runner himself/herself.
  • a serious illness necessitating hospitalization or a death one’s spouse or common-law husband/wife, one’s parents or one’s children in the first generation, this in the thirty days preceding the event.

In the case of an accident or serious illness to the runner, it is necessary to furnish a medical certificate with signature and stamp of the doctor attesting to the contra-indication to taking part in the race. All other reasons for cancellation must be justified with a certificate signed and stamped by an official authority.

Conditions of indemnity: Any demand for reimbursement must reach us accompanied by the medical certificate, at the last in the 10 days following the event. The demands are treated in the two months which follow the event.

Any cancellation of registration must be made by email at No cancellations are accepted by telephone or fax.

In the case of cancellation for a cause described in the paragraph above, the competitor can, if they have subscribed to it at the time of their enrolment, make his guarantee of enrolment cancellation function by sending us with his letter of withdrawal the necessary document (see above paragraph).

If a competitor registered has not taken out the cancellation guarantee upon registration or wishes to cancel their registration for a reason not covered by this cancellation guarantee, reimbursement of a percentage of the registration fee will be made by crediting the bank account associated with the credit card used upon registration in accordance with the following conditions:


Race bib exchange is not allowed. Registration fee can NOT be used for the following race year (2020), and it’s not transferable to another person unless being communicated with the organizer.

Should the race be canceled because of circumstances beyond our control up to 15 days before the race, the Organization reserves the right to refund 50% of the admission fee. This percentage is calculated to enable the Organization to cover part of the expenses incurred.

Should the race be canceled or interrupted for atmospheric reasons, or for any other reason beyond our control, no refund of the registration fee will be made.

In the case of a non chronic osteoarticular or muscular injury to the runner, and uniquely in this situation, suffered after registration and not completely curable by the day of the race, the organisation recommends that the injured runner does not take an unnecessary risk, and cancels his registration for the current year at the same time making a request to participate in a future race.

Any request for postponement must reach us, accompanied by a complete medical report (detailed medical report and x-ray results confirming the diagnosis) by April 23rd, 2019 at the latest. Any incomplete report will be rejected.

Requests will be processed by May 15th, 2019 at the latest. The only medical council will judge the case and their decision is final.

By registering, each runner personally agrees to engage in the following :

  • I declare that I have read and understood the regulations and ethics of the race (available at
  • I understand and approve of the conditions of participation which figure in the regulations
  • I agree to respect all items of the regulations
  • I agree to scrupulously respect and promote the ethic
  • I agree to be aware of any medical condition which could concern me and, consequently relieve the organization of any responsibility for any medical problem which may arise during the event due to any negligence on my part

In order to participate in these events, a set of obligatory equipment is required. However, it is important to note it is the minimum necessary and that each trail-runner must adapt it according to their needs. It is important, in particular, not to choose clothing that is the lightest possible weight in order to gain a few grams but to choose items which will give real protection against the cold, windy or snowy mountain weather, therefore giving a good level of security and performance.

Obligatory material :




110 KM


67 KM


41 KM

mobile phone  (save in the contacts the security numbers of the organization, keep it switched on, do not hide one’s number and do not forget to set off with recharged batteries) O O O O
personal beaker 15cl. minimum (water-bottles or flasks with lids are not acceptable) O O O O
a stock of water minimum 1 liter O O O O
torch in good working condition with replacement batteries O O O
survival blanket 1.40m x 2m minimum O O O O
whistle O O O O
basic first-aid kit (2 gauze pads 10×10 cm minimum, 1 gauze roller bandage, a box of adhesive bandages) O O O O
food reserve O O O O
Jacket, with a hood, capable of withstanding the bad mountain weather and made with a waterproof (recommended: 10 000 Schmerber) and breathable (RET recommended less than 13) membrane O O O TBA
long running trousers or leggings or a combination of leggings and long socks which cover the legs completely O O R R
Additional warm mid layer top: One single mid layer long sleeve top for warmth (cotton excluded)

OR a two piece clothing combination of a long sleeve baselayer/mid layer for warmth (cotton excluded)

cap or bandana R R R R
warm hat R R R R
warm and waterproof gloves R R R R
waterproof over-trousers R R R R

O – obligatory equipment

R – recommended equipment

SR – strongly recommended equipment

TBA – to be announced

* – the jacket must, imperatively, have an integral hood or one which is attachable by a system made for that effect by the manufacturer.

  • all seams must be taped/sealed.
  • the jacket must not have sections composed of fabric which is not waterproof, but the air vents (under the arm, across the back), which do not appear to affect the waterproof-ness of the garment are accepted.

It is the runner’s responsibility, according to these criteria, whether their jacket fits the regulations and therefore bad weather in the mountains, but, when controlled, the judgment will be made by the person responsible for the control or the race steward.

* The windproof jacket does not replace the mandatory waterproof jacket with hood

Required by the police :

  • ID card

Very strongly recommended :

  • walking poles for security on the slippery ground in case of rain or snow
  • a change of warm clothes indispensable in the case of cold weather, rain or injury
  • the sum of 20 € minimum (in Croatian kunas, in order to cover the unexpected….)

Advised (list not definitive) :

  • change of clothing, compass, knife, string, sun cream, Vaseline or anti-chaffing cream,…

All clothing must be the runner’s size and without alteration since leaving the factory.

If you decide to use poles, you must keep them throughout the whole of the race. It is forbidden to start without sticks and recover them up along the way.

No poles will be allowed in the spare’s bags.

Every BIB is individually handed to each runner after presentation of:

  • an ID card or a passport,
  • and a race pack with complete mandatory equipment

The race bib must be worn on the chest or the stomach and must be permanently and fully visible throughout the entire race. It must, therefore, always be positioned over any clothing and cannot for any reason be fixed onto the back or a leg. The name and logo of the sponsors must neither be modified nor hidden.

The race number is the pass necessary to get to the shuttles, buses, refreshment posts, nurses, rest areas, showers, areas for depositing or recuperating spares bags…Except in the case of refusal to comply with a decision taken by a race official, the race bib is never withdrawn, but in the case of retirement, it is deactivated.

RED & BLUE : each competitor receives with his/her race bib, two plastic bags.

The big one: for the aid station Buzet. Having filled it with stuff of their choice and having closed it, they can deposit it, at the designated place at the race HQ in the working hours. The bag is transported by the organization to Aid station Buzet. When reaching Buzet, each runner reclaims their bag. When they leave again, they deposit their bag at the area set aside for this purpose. The bag is then taken back to Umag.

Small one: for the personal stuff/gear at the start point. Having filled it with the stuff competitors doesn’t want to carry along the course, they can deposit it at the designated places at each race start. The bags are then taken back to Umag.

GREEN & YELLOW:  each competitor receives with his/her race bib, small plastic bags.

Small one: for the personal stuff/gear at the start point. Having filled it with the stuff competitors doesn’t want to carry along the course, they can deposit it at the designated places at each race start. The bags are then taken back to Umag.

The organization assures the repatriation, to Umag, of bags belonging to runners who have abandoned, on the condition that their abandonment has been registered. The delay of the return of bags is based on the logistical constraints and the organization cannot guarantee a complete return of the bags before the end of the race.

Only the bags supplied by the organization will be transported. Sticks are not transportable in these bags.

The contents of the bags is the runner’s responsibility, any complaint about the contents on arrival is not acceptable. It is recommended not to put valuable objects in it.

The Organization will definitely NOT send any bag to participants’ home. Bags not collected after this deadline will be immediately destroyed for reasons of hygiene.

It is recommended to keep toiletry and change of clothing material in Umag.

First aid posts are positioned at different points throughout the course. These posts are in radio or telephone liaison with Race Control. A medical control team is present during the entire duration of the event in Umag.

The rescue posts are aimed at bringing help to any person in danger with the means particular to the organization or registered.

If it appears that a runner is in difficulty or seriously injured to call for assistance :

  • go in person to a first aid point
  • telephone the course controller
  • ask another runner to alert the first aiders

It is essential that each runner helps anybody in danger and alerts the first aid point.

Do not forget, that due to the problems related to the environment and the type of event, one might have to wait for assistance for longer than anticipated. Your security, therefore, depends upon the quality of the materials that you have in your pack.

A runner calling on a doctor or a rescuer submits himself to their authority and undertakes to accept their decisions. From the moment where the health of a runner necessitates treatment via an intravenous drip, the runner will be, obligatorily, excluded from the race.

The first-aiders and doctors have the right to :

  • exclude from a race (by invalidating the race-bib) all competitors deemed unfit to continue the event.
  • to evacuate by any means a runner judged to be in danger
  • to hospitalize any runners whose state of health necessitates doing so

The choice of the means of evacuation and of the hospital is the decision of the official first-aiders and doctors.

Expenses incurred, resulting from emergency assistance or evacuation, are payable by the person rescued who is also responsible for all costs relating to their return from the area to where they were rescued. The only resort is for the runner to constitute and present a dossier to his personal insurance within the deadline given.

If for any reason it is impossible to make contact with the course controller (+385 91 577 44 25), you can call the rescue services directly by dialing 112 (especially if you find yourselves in a zone «urgency SOS only»)

Each runner must stay on the way-marked paths, even to sleep. Any runner who voluntarily leaves the way-marked path is no longer under the responsibility of the organization.

Each runner will be supplied with electronic chips fixed to their race-bibs. Runners who do not have their chip permanently with them will be penalized.

A control is carried out on the arrival of any rescue or refreshment post.

Unexpected control posts are set up in places other than the rescue and refreshment posts. Their position is not communicated by the organization.

Only the runners carrying a visible and duly controlled race number have access to the refreshment posts.

The race guide and the relevant pages on the internet give a precise list of the refreshment points.

They will be equipped with drinks + sweet cakes, chocolate, bananas, oranges, raisins, prunes, salty biscuits, cheese, sausage, bread.

Rations without gluten will be available upon request

Furthermore, a hot dish is offered in Buzet and in Umag at the end of the race.

To avoid the wastage of disposable plastic cups during the race, every runner has to equip himself with a tumbler with a minimum volume of 15cl. Attention, water-bottles, and flasks are not beakers!

Every runner seen throwing down their litter along the route will be penalized.

Trash cans are provided in large numbers at every refreshment post and must be used.

The maximum time for the event, for the totality of the course, is fixed at:

  • RED: 46 hours
  • BLUE: 30 hours
  • GREEN: 15 hours
  • YELLOW: 8 hours

The cut-off times for leaving the principal control posts will be marked and written in the course guide.

These cut-off times are calculated to enable participants to reach the Finish in the maximum time imposed while making possible stops (rest, meal…) To be authorized to continue the event, runners must set off again from the control post before the fixed cut-off time (whatever their arrival hour at the control post).

Any competitor excluded from the race and wishing to continue his race can only do so after returning his race number, at his own responsibility and in complete autonomy.

Participants who reach the checkpoints after the cut-off time, those who are injured and those who are judged by the medical staff to be unfit to continue the race, and any other athletes who decide to drop out, shall be taken to the finish line by shuttle bus. For logistical reasons, competitors who have dropped out may have to wait before being returned to the finish area. Any participant who drops out from the race at any point other than the established checkpoints should make their own way to the following aid station/checkpoint and from there will be transported to Umag by car.

In the case of poor weather conditions and/or for reasons of safety, the organization reserves the right to stop the event underway or to modify the cut-off times.

Uniquely for RED and BLUE race: at Buzet, each competitor can benefit from a rest area (with camp beds and blankets).

Those runners who wish to stay on in Umag after the race must make their own accommodation arrangements.

It is possible to take a hot shower, only at the arrival.

Access to the rest area and to the showers at the arrival is strictly limited to runners in bare feet.

Except for injury, a runner must only abandon at a control post. They must alert the head of the post, who will invalidate their race-bib.

The runner keeps his invalidated race bib because it is still his pass for shuttles, buses, meals, care rooms…

During the closure of the post, the organization can, in the measure of means available, repatriate the runners having retired and still present at the post

ln the case of unfavorable weather conditions justifying partial or total closure of the race, the organization ensures the repatriation as soon as possible of those runners having retired.

In case of abandonment before a control point, it is imperative to return to the previous control point and inform the post leader of one’s abandonment.

If during this return, the runner meets the end of race sweepers, it is them who invalidate the race bib. The runner is then no longer under the organization’s control.

For better night vision, the way markers include a section of white reflective material which will be easily visible with a head torch.

ATTENTION: if you can not see any more markers, retrace your steps!

With respect for the environment, no paint will be used on the paths.

It is imperative that you follow the paths with the markers without taking shortcuts.

When you finish, you will receive a finisher’s medal.

Race officials present on the course, and those in charge of different control and refreshment posts are authorized to uphold regulations and to immediately (*) impose a penalty for non-respect, based on the following chart :

Short-cutting the route At the race directors’ decision
Lacking obligatory safety equipment (no minimum water supply of 1 liter, no waterproof jacket with hood, no torch, no survival blanket, no mobile phone) Immediate disqualification
Lacking other obligatory equipment Penalty 30 min
Refuse to have obligatory equipment checked out Disqualification
Throwing away rubbish (voluntary act) by a competitor or a member of their team Penalty 1 hour
Not respecting people (organization or runners) Penalty 1 hour
Not assisting a person in difficulty (requiring official assistance) Penalty 1 hour
Receiving help outside authorized zones Penalty 1 hour
Cheating (e.g.: using transport, sharing race number,…) Immediate disqualification and for life
Lacking an electronic chip Depending on the Race Jury
Not passing through a control point Depending on the Race Jury
Refusal to comply with an order from race control, from a race official, from a head of the post, from a doctor or from a rescue worker Disqualification
Departure from a control post after the cut-off time Disqualification

(*) Time penalties are immediately applicable in situ, that’s to say a runner will be required to interrupt their race for the duration of the penalty.

Any other breach of the rules will be the object of a sanction decided on by the Race Jury.

All objections must be in writing and lodged with the course director, with a caution of 100 (one hundred) euros (non-returnable if the objection is not valid), within two hours of the arrival of the runner concerned.

This is made up of:

  • a representative of the runners
  • the Sport box d.o.o. director
  • the race director

The jury is authorized to give a ruling in the time compatible within the imperatives of the race on all the objections lodged during the event. The decisions will be without appeal.

The organization reserves the right to modify at any moment the route and the positioning of the rescue and refreshment posts, without warning.

In the case of unfavorable weather conditions (important quantities of rain or snow at altitude, a strong risk of storms….) the start may only be postponed by maximum several hours, after that time the race is canceled.

In the case of poor meteorological conditions, and for reasons of safety, the organization reserves the right to stop the event underway or to modify the time barriers.

In case of cancellation of an event, for whatever reason, decided more than 15 days before the date of the start of the race, a partial refund of the registration fees will be made. The amount of this refund will be fixed so as to allow the organization to cover all irredeemable expenses committed, up to the date of the cancellation. In case of a cancellation decided less than 15 days before the departure or in case of interruption of the race, for whatever the reason, no refund of the registration fee will be made

Civil responsibility:

The organizer has taken out civil responsibility insurance for the duration of the event. This civil responsibility insurance guarantees the financial consequences of its responsibility, of that of its officials and of the participants.

Individual accident:

Each competitor should have their own accident insurance which will cover any costs of search and rescue.

For the four races, only the runners arriving at Umag are ranked.

For each race, a general ranking man and woman and a ranking for each category man and woman are established.

RED: the first 5 men and the first 5 women in the general ranking, as well as the winners from each category, receive a trophy and a prize

BLUE, GREEN, and YELLOW: the first 3 men and the first 3 women in the general ranking, as well as the winners from each category, receive a trophy and a prize


Seniors Men/Women           SEM / SEW          -1980

Veterans Men/Women 1      VM1 / VW1           1979-1960

Veterans Men/Women 2     VM2 / VW2          1959 and older

Competitors who are sponsored may only have the sponsor’s logos on their clothing or equipment used during the race. All other publicity accessories (flags, banners) are forbidden at all points of the race including at the finish, at the risk of penalties imposed by the jury.

Every competitor relinquishes their claim to photographic copyright during the event, and he relinquishes any recourse against the organizer and against his approved partners for the use of his image. Only the organization can pass on these rights for the image in any media, via an accreditation or an adapted license.