100K ultra runs in UK
Find 100k ultra runs near me in UK for 2025/2026 - filter by date or location, display on a map or use the advanced search to find your perfect race.
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Event listings
Select an event for photos, video, route, location, reviews, entry fees and how to enter.
- Fri 19 Sep
- £80
Peak District Challenge | Gold Ultra 100K
A hilly and challenging route showcasing the best of the Peak District for those who can maintain 4kph over 24 hours. Night navigation experience is essential.
- Enter online
- GPS tracking
- Hilly
- Age 20 & over
- 100 km trail running + 3300 m ascent
- Sat 20 Sep
- £165
Skyline Scotland | Jacobite 100
A runnable 100km with a Scottish Highland journey at the heart of the race experience with an exciting midnight mass start.
- Enter online
- GPS tracking
- Mountainous
- Age 18 & over
- 100 km trail running + 2400 m ascent
- 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
- Sat 20 Jun 2026
- £165
Race to the King | 100K Non-Stop
The full circuit takes in both the Coastal and Castle loops for a magnificent tour of the stunning South Downs. Steeped in history and uniquely varied, the 100K offers a course truly fit for royalty.
- Chip timing
- Enter online
- GPS tracking
- Undulating
- Age 18 & over
- 100 km trail running + 1510 m ascent
- Sat 11 Jul 2026
- £180
Race to the Stones | 100K Non-stop
Explore the Ridgeway, Britain’s oldest road, along a remarkably isolated and unspoilt corner of Southern England with sweeping chalk downs, ancient forests and the Avebury Standing Stones.
- Chip timing
- Enter online
- GPS tracking
- Undulating
- Age 18 & over
- 100 km trail running + 3704 ft ascent
- Sat 11 Jul 2026
- £255
Race to the Stones | 100K Over Two Days
Explore the Ridgeway, Britain’s oldest road, along a remarkably isolated and unspoilt corner of Southern England with sweeping chalk downs, ancient forests and the Avebury Standing Stones.
- Chip timing
- Enter online
- GPS tracking
- Undulating
- Age 18 & over
- 100 km trail running + 3704 ft ascent
- Sat 11 Jul 2026
- £165
Race to the Stones | 100K Two Days no camping
Explore the Ridgeway, Britain’s oldest road, along a remarkably isolated and unspoilt corner of Southern England with sweeping chalk downs, ancient forests and the Avebury Standing Stones.
- Chip timing
- Enter online
- GPS tracking
- Undulating
- Age 18 & over
- 100 km trail running + 3704 ft ascent
- Sat 20 Sep
Pilgrims Ultra | 100K
- 100 km trail running + 4000 ft ascent
- Sat 20 - Sun 21 Sep
Yorkshire 3 Peaks 70/100K Ultra | 100K
- 100 km trail running + 3169 m ascent
- Sat 18 - Sun 19 Oct
Ultra Tour Yorkshire Dales (UTYD) 100K, 50K & 25K Challenge | 100K
- 100 km trail running + 2960 m ascent
- Sat 18 - Sun 19 Oct
High Peak 70/100K Ultra | 100K
- 100 km trail running + 1460 m ascent
- Sun 22 Mar 2026
Canalathon-Ultra Running Festival | 100K
- 100 km road running + 377 m ascent
- Sun 3 May 2026
Tempo Trail Races | 100K Ultra
- 100 km trail running + 6682 ft ascent
- Sat 20 Jun 2026
Two Rose Ultra | Two Roses Ultra - 100K
- 100 km multi terrain running + 5175 ft ascent
- Fri 3 - Sat 4 Jul 2026
The Full Essex Way Ultra
- 82 miles trail running + 3469 ft ascent