24 & 48 h Self-Transcendence Race Kladno

About the event

Hello runners,

Once again, you were incredibly quick to sign up, so the race is currently full and registration is closed.

If you are interested, send us an email and we will put you on the waiting list. We cannot guarantee you a spot, but if one becomes available, we will let you know.

Thank you and have a wonderful year!

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2026 EDITION::

48h – start Friday 24th July 2026, 12:00 noon
24h – start Saturday 25th July 2026, 12:00 noon
Finish both races – Sunday 26th July, 12:00 noon

Registration 2026
Registration 2026 will open on Monday, January 5, 2026, at 12:00 p.m. and will automatically close once the capacity of 130 runners is reached.
 

***** Registration has been closed due to reaching the limit of runners. *****

List of participants 2026 can be found HERE.  

This year each runner will receive a T-shirt and a cap.

Our 48 hour and 24 hour Self-Transcendence ultramarathon in Kladno takes place in the beautiful environment of Sletiště park. The course is almost flat, with an elevation of only 1 m. It is set on a 1 km lap around the athletic stadium, mostly with trees for shade, and illumination at night.

The race is certified by IAU (Bronze label), partner of WA (World Athletics), and takes place in the presence of a referee or IAU technical committee member. Official 100 km, 24 h and 48 h races rules and records in the main categories are shown in PDF form here: rules, records.

Services: Refreshment station with a variety of warm and cool food and drinks, warm meal after the race. Medical station with massage services. Showers, restrooms and other facilities of athletic stadium will be available during the race. Runners can place their own camping tables and chairs with personal belongings, food and drinks at a designated area (view course map).

Please, see more details in sections below.

The 2025 RESULTS can be found HERE  and the PHOTOS from previous races in the gallery HERE.

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Klaus Tieferbrunner, Austrian filmmaker spoke at TEDx, about 3100 miles run and ran also in Kladno in 2021:
https://www.youtube.com/watch?v=3v-puiO_5RY&list=RDCMUCsT0YIqwnpJCM-mx7-gSA4Q&start_radio=1&rv=3v-puiO_5RY&t=0

and this was how he finished 100 km in Kladno in 2021:

https://uloz.to/tamhle/zHSQsCB3x7On#!ZGqyMwR2AJD4MzZjBQuzAzZ5AmHmMJ5CA3uFMF1OFRcRqGxmAN==

Race video

Video from last race (2023):