Rediscover your abilities while discovering the beauty of the Rhodopes
K3 ULTRA GBR 23K
The race
Zlatograd, 1 Stefan Stambolov St.
27.09.2025, 9:00 am
6 hours
Registration fee
from 01.03.25 to 03.04.25 including
35 EUR | 68.45 BGN
from 04.04.25 to 31.07.25 including
45 EUR | 88.01 BGN
from 01.08.25 to 03.09.25 including
50 EUR | 97.79 BGN
How can I pay
Bank: DSK Bank
BIC: STSABGSF
IBAN: BG71STSA93000025826614
Recipient: K3 Ultra Sports and Tourism Club Association
Reason for payment: Your names and registration code
By bank cards registered in ePay.bg
By bank cards not registered in ePay.bg (ePay World)
In cash at EasyPay checkouts.
CAUTION
• Registration without payment is NOT considered finalised!
• Early registration without payment does NOT reserve the right to a discounted fee (the fee is determined at the time of payment, according to the prices indicated for the three registration periods).
• All three registration periods INCLUDE a GBR K3 ULTRA T-SHIRT in the starter pack.
The start and finish of the K3 Ultra GBR 23K race are in Zlatograd. The course is completely different from 2024, but it resembles the 23 km route from 2021.
After the start, the runners enter the forest and begin moving along a scenic eco-trail, parts of which are located directly on the border line. After about 6 km, they reach the St. Kostadin aid station, where it is time for a short break and refreshments with authentic Rhodopean delicacies, specially prepared for them – patatnik, stuffed vine leaves, klin, and many more.
After the station, the route continues along a relatively easy section through beautiful forests and meadows until reaching the next aid station – Mostcheto (The Bridge). From there, an ascent follows towards Kosora Peak, which is mentioned in the famous song about Delyo Haydutin. From its summit, runners can often see the Aegean Sea to the south, while to the north, they will admire the magnificent ridges of the Rhodopes above Starzevo village.
After that, the runners descend to St. Ekaterina Chapel. From there, only two kilometers remain to the finish line in Zlatograd, a section shared by all distances.
Medical Check-ups Before Participation in
K3 ULTRA 2025
In order to ensure the safety and health of all participants, K3 ULTRA is introducing a mandatory pre-race medical check-up as a condition for participation.
1. Mandatory Medical Check-up Before Receiving the Race Pack
Each participant is required to undergo a medical check-up confirming they are in appropriate physical condition to take part in the race.
The check-up is mandatory and must be completed before collecting the race pack.
2. On-site Medical Station
- September 26 (Friday): from 12:00 PM to 12:00 AM
- September 27 (Saturday): from 5:00 AM to 8:00 AM
IMPORTANT! This year, the costs for the on-site medical check will be fully covered by the organizers of K3 ULTRA.
Athletes who are part of sports clubs and have already undergone their annual medical examination only need to provide an official document from their club or federation confirming the regular check-up.
3. Medical Certificate from an External Medical Provider
- Issued by a licensed medical professional or certified medical facility;
- Includes a date, official stamp, and signature;
- Has been issued no earlier than 72 hours before the race start.
- Conduct an additional on-site examination in case of doubts regarding the document or the participant’s health condition;
4. Withdrawal Due to the New Requirement
Participants who do not accept the new medical check-up requirement have the right to withdraw from the race.
To do so, they must notify the organizers by August 31, 2025, via email at k3ultrabg@gmail.com.
In this case, the full participation fee will be refunded.
T-SHIRT K3 ULTRA
The K3 ULTRA GBR T-shirt is made of high quality breathable fabric to be a loyal and faithful ally of the runners in the mountain. The design of the T-shirt successfully conveys and complements the overall experience of K3 ULTRA.
*The T-shirt of the event IS included in the starter pack.
What is included in the K3 ULTRA entry fee
What you get
Starter pack
The starter pack for each contestant includes a t-shirt, starter number, gifts from the sponsors and partners of the competition as well as a special surprise prepared by the organisers.
Perfect event organisation
K3 ULTRA participants will have carefully placed markings, cleared and safe trails with minimal asphalt sections, electronic reporting of the results, information on hotel accommodation, tent and camper site. Professional photo footage.
CATEGORIZATION AND
INDEX BY UTMB
Ability to rank in UTMB competitions.
Medical assistance
The safety of the participants in the ultramarathon is ensured by mountain insurance included in the entry fee and the availability of medical assistance during the entire event.
Food and drinks
The aid stations at the ultramarathon will be stocked with water, hot and refreshments. Special food is also provided – fruits, vegetables, Rhodope specialities, as well as supplements.
Unforgettable moments
Amazing views, emotional experience, fabulous Rhodopes and new friendships. All participants who cross the finishing line of K3 ULTRA will receive a medal - part of BG Ultra Slam, uniting the leading ultramarathons in Bulgaria.
Details
Maps, tracks and technical information
Get ready for the big day
Important information about the race
Equipment
Mandatory equipment will be checked at the start or when the starter packs are given. Each participant must carry their own mandatory equipment and may be checked at any station OR at the finish line when the race has ended. Everything that is missing from the mandatory equipment, will result in immediate disqualification. There are no penalties for a missing recommended gear.
Declarations
Competitors must sign certain declarations to participate in the competition. The declarations can be downloaded below. Please familiarise yourself with the text of the document. The declaration of participation is signed electronically upon receiving the starter pack. The declaration of participation for persons under 18 is to be printed, signed by both parents and provided upon receiving a start number for the child.
Download declarations here:
1) Declaration for participation in K3 ULTRA
2) Declaration for participation for participants under 18 in K3 ULTRA
Тракове
Registration for K3 ULTRA
Anyone wishing to participate in the K3 ULTRA Ultramarathon must register and sign in by selecting a distance, entering additional data and paying the appropriate entry fee.
(Users who have registration in iRun.bg, don’t need to register again.)
After 03/09/25 no registrations will be accepted. On-site registrations are not available.
* The distance can be changed before payment is made.
* Water, medical care, aid stations, electronic reporting of results are provided for all participants at all distances.
* All participants in distances 13K, 23K, 43K, 63K and GEOPS 100K who have finished in the control time receive a medal – part of BG Ultra Slam.
Mandatory equipment
*Mandatory equipment will be checked before the start or when receiving the starter packs. Each participant must carry their mandatory equipment themselves and may be checked arbitrarily at an aid station or at the final, after the end of the race. The lack of any item from the mandatory equipment will lead to immediate disqualification.
Recommended equipment
*There are no penalties for missing recommended equipment