A true adventure in the heart of the Rhodopes


The race


Zlatograd, 1 Stefan Stambolov St.


30.09.2023г., 5:00 am

Control time

15 hours

Registration fee

Early bird registration

from 14.02.23 to 13.04.23 including

Early bird registration price

40 EUR

Standard registration

from 14.04.23 to 31.08.23 including

Standard registration price

50 EUR

Late registration

from 1.09.23 to 20.09.23 including

Late registration price

50 EUR

How can I pay

Bank transfer

Bank: DSK Bank​
IBAN:​ BG71STSA93000025826614
Recipient: ​Sdruzhenie "K3 ULTRA"
Reason for payment:​ Your names and registration code

Easypay / ePay.bg system

By bank cards registered in ePay.bg
By bank cards not registered in ePay.bg (ePay World)
In cash at EasyPay checkouts.


• 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).
• Early bird and standard registrations include a GBR K3 ULTRA T-shirt in the starter pack. In case of late registration, one is not included in the starter pack.

What to expect from the GBR 63K adventure?

The K3 Ultra GBR 63K is also updated this year. Runners will start from the centre of Zlatograd to the west, will pass through the old town and past the Watermill and will take a scenic eco trail to St. Nedelya Peak.

According to recent studies, there was located one of the fortresses of Momchil – the Rhodope king. Here around the historical St. Nedelya Chapel an aid station will also be placed.

From St. Nedelya Peak, the route descends to the Nedelinska River and after crossing it the runners will head north over the town of Nedelino through beautiful, sheltered neighbourhoods and palanquins to reach the remarkable Roman bridge related to one of the sad stories of the area.

From there, after a short rest, the runners will begin the ascent to Shadiytsa Peak, from where everyone will be able to enjoy breathtaking views: to the north the familiar Rozhen, Snezhanka and Perelik peaks, and to the south – the ridge along our southern border, with Marzyan, Lomska Chuka and Veykata peaks.

A pleasant descent of about 6 km follows to the Pechinsko Pass, where an aid station will be situated. From there, the route passes under Buchovitsa Peak and picturesque rocks above the spring of the Erma River, and after a short rest the runners will pass through amazing beech forest and start running along the border itself. On the southern border, they can admire the Rhodopes in friendly Greece, and in clear weather on the over 2000 m high peaks of the Samothrace Island. To the east is the dreamlike valley of the Varbitsa River.

From the border there is a smooth descent again along the ridge of the mountain that passes above the village of Alamovtsi, where there will be an aid station, through Rupchevo Peak, Kilovi Kolibi and Kosora Peak. After that, the runners descend to the St. Ekaterina Chapel. And from there to the finish in Zlatograd, are only two kilometres, the same for all distances.

Great things happen when people and mountains meet!

What is included in the K3 ULTRA entry fee

What you get

Starter pack

Each competitor receives a starter pack consisting of a bib number and a unique K3 ULTRA T-shirt branded especially for the purpose of the event (with the exclusion of the runners who sign up and pay participation fee in the Late registration period).

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.

ITRA Certification and UTMB Index

Ability to qualify for the UTMB® Index and for ITRA Certification.

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

A unique experience on the trail and new friendships. A unique medal is provided for very participant to finish K3 ULTRA. Gifts from our sponsors and partners.


Maps, tracks and technical information

Get ready for the big day

Important information about the race



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. Missing whistle, food or containers for liquids with a capacity of less than 1 litre will result in a penalty – one hour for each. Everything else that is missing from the mandatory equipment (including containers for liquids), will result in immediate disqualification. There are no penalties for a missing recommended gear.



Competitors must fill in certain declarations in order to participate in the race. You can download the declarations here. Please read, print, sign and bring in person to the Registration Desk.

Download declarations here:

1) Non-liability statement
2) Data Privacy Statement
3) Declaration of participation of persons under 18 years of age



Download GPX tracks here to help your route navigation.

Download track here:

1) Official GPX track


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 20/09/23 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 85K receive a gift – a unique K3 ULTRA T-shirt, branded specifically for the event, without those who registered and paid in the late registration, and all finishers at these distances – a unique medal.

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. A missing whistle, food or a liquid container with a capacity under 1 litre will mean a penalty by one hour for each! The lack of any other item from the mandatory equipment (including liquid containers) will lead to immediate disqualification.

Recommended equipment

*There are no penalties for missing recommended equipment