K3 ULTRA
Participation requirements
Who can participate
Participation in the competition is open to both men and women who are at least 18 years old on the day of the start. Participation is voluntary and requires good physical and mental preparation, as well as possession of the mandatory equipment in accordance with the regulations for the respective distance.
The participant must be familiar in advance with the length, terrain, and specific features of the course, and must be able to independently handle challenges such as: adverse weather conditions (rain, fog, snow, heat), movement during the hours of darkness, physical exhaustion, injuries, and encounters with wild animals.
All participants must:
- Sign a declaration agreeing to the terms of participation and releasing the organiser from liability;
- Undergo a mandatory free medical check-up before receiving their race pack.
If the examination reveals a health condition that poses a contraindication for participation (e.g. acute illness, cardiovascular or respiratory issues), the participation fee will be refunded in full (100%).
When am I registered?
Registration is considered complete only after payment has been received. Confirmation of successful registration will be sent by e-mail from the organiser.
The applicable participation fee is determined by the date of payment, regardless of when the initial registration was made.
Declarations
Only registered participants who have signed the required declarations will be allowed to take part in the competition. The participation declaration is signed electronically upon presentation of an identity document at the Headquarters on the day of collecting the race pack. The participation declaration for individuals under 18 years of age must be printed, signed by both parents, and submitted when collecting the race number for the child.
Conditions for Changes
Refund policy:
- During the late registration period (01.08 – 01.09.2026) – 50% of the fee is refundable.
- After the end of online registration – the fee is non-refundable.
Transfer Policy:
- Transferring participation to the following year is possible until the closing of online registration.
- Transferring the registration to another participant can be done up until the online registration closes.
- Changing the race distance is allowed until the online registration closes.
K3 ULTRA
Medical Check-ups Before Participation in
K3 ULTRA 2026
To ensure the safety and well-being of all participants, the pre-race medical check-up remains a mandatory requirement for K3 ULTRA in 2026.
There is no need to bring a pre-issued medical certificate. The check-up is conducted on-site by licensed medical professionals at no additional cost.
If the examination reveals a health condition that poses a contraindication for participation (e.g. acute illness, cardiovascular or respiratory issues), the participation fee will be refunded in full (100%).
K3 ULTRA
Obligations of participants
Equipment of participants
For races of this scale, participants must be well equipped and have the necessary equipment.
For each of the routes, the organisers will have indicated the mandatory and recommended equipment. Mandatory equipment must be presented by competitors when receiving the starter pack.
The organisers of the race reserve the right to inspect the availability of all items of mandatory equipment during the race. The absence of any one of these elements will lead to disqualification of the participant.
The use of trekking poles is permitted. It is not allowed to leave poles at the aid stations. A competitor who starts with poles must finish with them.
Prohibitions
The following actions are strictly prohibited:
- Deviating from the marked course or using alternative paths;
- Receiving outside assistance outside authorised zones (checkpoints, organiser’s medical/logistical zones);
- Failing to follow the instructions of organisers, volunteers, or medical personnel;
- Missing or deliberately concealing part of the mandatory equipment;
- Refusing to provide assistance to a participant in need or in the event of an incident;
- Using prohibited substances or methods included in the WADA list;
- Polluting the course or the environment, or discarding waste outside designated areas.
Ethical relations
All competitors are obliged to assist any person – another competitor, volunteer, spectator, or tourist – in case of need, regardless of any delay this may cause.
If a competitor finds themselves in a dangerous situation together with other people, they must first ensure their own safety before assisting others.
Unregistered participants are not allowed to move along the course together with competitors, nor may competitors receive any assistance from outside persons outside the official checkpoints, except in cases of absolute necessity.
Organisers, doctors and members of the medical team, rescue team members, volunteers, and all persons authorised by the organisers have the right to stop a competitor from participating further if they deem that their condition does not allow safe continuation. The decision of such persons takes immediate effect.
Environmental protection
Competitors must move on the marked route only, and it is forbidden to drop any kind of litter on the route and near it.
In order to reduce waste, there will be no plastic cups and water bottles at the aid stations. All competitors must carry a suitable container for the water and other beverages provided at the aid stations.
Spectators and supporters are advised to use public transport whenever possible.
K3 ULTRA
The race
When will I receive my starter pack?
Participants in the GBR 23K and GBR 13K distances may also collect their race packs on the day of the event, until 08:00.
Aid stations
The organisers will set up aid stations in appropriate places along the routes. These stations will offer water, soft drinks and food to the competitors.
Food and water at the aid stations are intended only for officially registered competitors.
An information board will be placed at each aid station, which will contain information about:
- the name of the aid station and the name of the next one along the route;
- distance and ascent to the next point;
- total descent to the next station;
- time limit to reach the next station – where such a limit is set;
- availability of water sources along the route to the next station;
- relative difficulty of the transition to the next station.
Competitors are allowed to receive help from outsiders only on the territory of the aid stations and in the places designated for this purpose.
Security
The race routes pass through public and private properties and will not be closed to non participants! Competitors must make sure they overtake or pass by people in a way that is safe for everyone, even if that means slowing down or even stopping if necessary!
When passing through populated areas and roads with traffic, competitors must comply with the traffic rules of the Republic of Bulgaria!
The race routes cross a major thoroughfare – participants must be extra careful in such sections!