# 400 Ultra

Unsupported 400 km loop from Mostek. Carry everything yourself, no outside help.

- Page: https://ultracyclinghub.com/events/400-ultra/
- Format: race; discipline: gravel; surface: Gravel
- Country: Czechia (East Bohemia)
- Organizer website: https://400ultra.cz/en/main/
- Verified on: 2026-10-09

## Editions

### 2026 · 400 km

- Page: https://ultracyclinghub.com/events/400-ultra/2026/187/
- Status: Past edition
- Start date: 2026-05-22
- End date: 2026-05-24
- Start location: Mostek
- Finish location: Mostek
- Distance (km): 400
- Time limit (hours): 60
- Support: Self-supported
- Registration: Closed
- Edition source: https://400ultra.cz/en/main/
- Verified on: 2026-10-09

#### Notes

- 60 hours to finish

Unlisted facts are not verified for this edition.

## Sources

- [Official site](https://400ultra.cz/en/main/), checked 2026-10-09: 2026