Trail Half marathons in May 2026
Find trail half marathons near me in May 2026 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.
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MapEvent listings
Select an event for photos, video, route, location, reviews, entry fees and how to enter.
- Mon 4 May
- £20-£27
Bank Holiday Madness May | Half Marathon
Come and join the day of running and aim to complete a midweek half marathon within the 7-hour time limit on a scenic course then receive a fantastic medal and goody bag at the finish!
- Enter online
- Flat
- Age 17 & over
- 13.1 miles trail running
- Sat 9 May
- £43-£45
Magna Carta Summer | Half Marathon
The Magna Carta Half Marathon is based in scenic Runnymede right near the historic site where the treaty of Magna Carta was agreed by King John of England and signed on 15th June 1215.
- Chip timing
- Enter online
- Flat
- Age 17 & over
- 13.1 miles trail running + 70 ft ascent
- Sun 10 May
- £16-£35
The Spring Lucky Dip Run
Come and join the Spring Lucky Dip Run! There is no set medal for this race; instead, you will get to choose your own from a selection of medals from past events!
- Beginner-friendly
- Event village
- All ages
- Trail run
- 5K run
- 10K run
- Half marathon
- Marathon
- + 3 more races
- Sun 10 May
- £35
Shires and Spires | Half Marathon
The multi-terrain half marathon is mostly on road and covers a section of the longer distance routes.
- Chip timing
- Enter online
- Undulating
- Age 18 & over
- 13.4 miles multi terrain running + 897 ft ascent
- Sat 16 May
- £65-£70
Keswick Mountain Festival | adidas TERREX Half Marathon Trail Run
This 25km is graded ‘hard’ and is on technical, fast flowing and rugged trails around Derwentwater, the Borrowdale Valley and the Watendlath Valley. Includes Full Weekend Festival Ticket in the price!
- Beginner-friendly
- Music
- Chip timing
- Enter online
- Hilly
- Event village
- Age 18 & over
- 25 km trail running + 750 m ascent
- Sat 16 May
- £28
Roadford Lake Trail Races | Half Marathon
By popular demand, a half marathon trail race has been added to the multi-sports weekend at the scenic Roadford Lake, with an inclusive and encouraging atmosphere, and lakeside camping.
- Chip timing
- Enter online
- Age 15 & over
- 13.1 miles trail running + 1298 ft ascent
- Thu 21 May
- £17-£29
Dun Holm Challenge | Day 1 | Half Marathon
Whether you are a Durham resident, you just love the area, or you fancy running along the River Wear with views of the Cathedral, then this looped half marathon is for you! Durham-themed medals too.
- Enter online
- Age 17 & over
- 13.1 miles trail running
- Fri 22 May
- £17-£29
Dun Holm Challenge - Day 2 | Half Marathon
Whether you are a Durham resident, you just love the area, or you fancy running along the River Wear with views of the Cathedral, then this looped half marathon is for you! Durham-themed medals too.
- Enter online
- Undulating
- Age 17 & over
- 13.1 miles trail running
- Sat 23 May
- £33-£38
Farmmageddon | Half Marathon
Can you survive Farmmageddon? A fantastic half marathon through the lovely grounds of Hyde Hall Farm as part of the Farmmageddon endurance weekend.
- Chip timing
- Enter online
- Traffic free
- Age 18 & over
- 13.1 miles trail running + 656 ft ascent
- Sat 23 May
- £17-£29
Dun Holm Challenge | Day 3 | Half Marathon
Whether you are a Durham resident, you just love the area, or you fancy running along the River Wear with views of the Cathedral, then this looped half marathon is for you! Durham-themed medals too.
- Enter online
- Undulating
- Age 17 & over
- 13.1 miles trail running
- Sun 24 May
- £17-£29
Dun Holm Challenge | Day 4 | Half Marathon
Whether you are a Durham resident, you just love the area, or you fancy running along the River Wear with views of the Cathedral, then this looped half marathon is for you! Durham-themed medals too.
- Enter online
- Undulating
- Age 17 & over
- 13.1 miles trail running
- Sun 24 May
- £30-£32
Get the Hull out of Here | Half Marathon
Based out of East Hull this half marathon will run out on the TransPennine Trail towards Hornsea, it should allow runners to enjoy a flat even surface ideal or both beginners or for seasoned athletes.
- Enter online
- Flat
- PB
- Age 17 & over
- 13.1 miles trail running
- Mon 25 May
- £17-£29
Dun Holm Challenge | Day 5 | Half Marathon
Whether you are a Durham resident, you just love the area, or you fancy running along the River Wear with views of the Cathedral, then this looped half marathon is for you! Durham-themed medals too.
- Enter online
- Undulating
- Age 17 & over
- 13.1 miles trail running
- Sun 31 May
- £55
Blair Castle Trail Weekender | Atholl Trail Half Marathon 21.1K
New! A weekend of inclusive trail races, camping, festival vibes, yoga workshops, guided runs, live music and outdoor cinema, all based in the grounds of the iconic Blair Castle in the Cairngorms.
- Chip timing
- Enter online
- Mountainous
- Traffic free
- Age 18 & over
- 21.1 km trail running + 400 m ascent
- Sun 3 May
Tempo Trail Races | Half Marathon
- 13.1 miles trail running + 884 ft ascent
- Sat 9 May
Sid Valley Ring Half and Third Marathon | Half Marathon
- 21.1 km trail running + 596 m ascent
- Sat 9 May
Radyr Trail Races: Half Marathon and Marathon | Half Marathon
- 13.1 miles trail running
- Sat 9 May
Endurancelife | Exmoor | Half Marathon
- 13.5 miles trail running + 2822 ft ascent
- Sun 10 May
Run Rabbit Trail Festival | Thump Trail Half
- 13.1 miles trail running
- Sun 10 May
Happy Valley Trails Event | Half Marathon
- 13.1 miles trail running + 770 m ascent