100K ultra runs in Wales
Find 100k ultra runs near me in Wales for 2025/2026 - search by date or place, display on a map or use the advanced search to find your perfect race.
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Click an event for full event details, location, route, sustainability, what's included and how to enter.
- Sat 19 - Sun 20 Jul
- £199
- Entries closed
- Sat 19 - Sun 20 Jul
- £199
- Entries closed
Gower Peninsula Ultra Challenge | Full Continuous 100K
A magnificent challenge from Penrice Castle featuring a figure-of-eight route, Oxwich Bay, the stunning Wales Coast Path, the Gower Way, Mumbles Head, Gowerton and a massive welcome celebration too!
- Chip timing
- Enter online
- GPS tracking
- Hilly
- Age 18 & over
- 100 km multi terrain running + 2200 m ascent
- Sat 19 - Sun 20 Jul
- £199
- Entries closed
- Sat 19 - Sun 20 Jul
- £199
- Entries closed
Gower Peninsula Ultra Challenge | Full 2 Day Daylight 100K
A magnificent challenge from Penrice Castle featuring a figure-of-eight route, Oxwich Bay, the stunning Wales Coast Path, the Gower Way, Mumbles Head, Gowerton with a good night's sleep mid-way.
- Chip timing
- Enter online
- Hilly
- Age 18 & over
- 100 km multi terrain running + 2200 m ascent
- Sat 25 Apr 2026
- £90.50
- Sat 25 Apr 2026
- £90.50
North Wales 100K
This event gives participants the opportunity to take in a runnable, beautiful route which follows the North Walian coastline between Prestatyn and Bangor.
- Chip timing
- Enter online
- GPS tracking
- Age 18 & over
- 100 km trail running + 8000 ft ascent