{"slug": "400-ultra", "name": "400 Ultra", "url": "https://ultracyclinghub.com/events/400-ultra/", "kind": "race", "discipline": "gravel", "surface": "Gravel", "country": "Czechia", "region": "East Bohemia", "description": "Unsupported 400 km loop from Mostek. Carry everything yourself, no outside help.", "official_url": "https://400ultra.cz/en/main/", "verified_on": "2026-10-09", "needs_recheck": false, "editions": [{"id": 187, "url": "https://ultracyclinghub.com/events/400-ultra/2026/187/", "year": 2026, "label": "400 km", "status": "confirmed", "display_status": "Past edition", "start_date": "2026-05-22", "end_date": "2026-05-24", "start_location": "Mostek", "latitude": 50.00995, "longitude": 16.26634, "distance_km": 400, "elevation_m": null, "time_limit_hours": 60, "support": "self", "registration": "closed", "registration_url": "", "registration_opens": null, "registration_closes": null, "entry_fee": null, "currency": "CZK", "entry_requirements": "", "route_summary": "", "route_url": "", "finish_location": "Mostek", "logistics": "", "notes": "- 60 hours to finish", "follow_url": "", "source_url": "https://400ultra.cz/en/main/", "verified_on": "2026-10-09", "needs_recheck": false}], "sources": [{"title": "Official site", "url": "https://400ultra.cz/en/main/", "checked_on": "2026-10-09", "facts": "2026", "edition_id": null}]}