Registration and pricing
Race description
Kozha Kaya is Bulgaria's first fully autonomous ultramarathon, held in the village of Bilka, in the Kozha Kaya peak area. The race offers various distances with significant positive elevation gains and no support stations, making it a true test of endurance and skills. Participants are challenged to finish before sunset, enjoying stunning views and natural beauty. This is an event for adventure and mountain running enthusiasts, leaving a lifelong memory.
Highlights
- 75 km with 4400 m positive elevation gain and full autonomy
- 42 km marathon with over 2700 m positive elevation gain without support stations
- 30 km Sky with 1950 m positive elevation gain and full autonomy
Additional information
All distances are with full autonomy, without support stations. There is an additional challenge - a speed ascent of Kozha Kaya 3.6 km with 500 m positive elevation gain. The event takes place in a natural environment rich in flora and fauna, offering breathtaking views and challenging terrains. The race is scheduled for May 1-2, 2026, with participants able to choose between different distances suitable for both experienced runners and amateurs. Registration is available on the official website.