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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Select an event for photos, video, route, location, reviews, entry fees and how to enter.
- Fri 1 May
- £15-£27
Midweek Chasing Numbers May | Half Marathon
The aim of the midweek runs is to hold events as cheaply as possible in order for people to be able to build their numbers or simply to help people achieve their own goals at an affordable price.
- 13.1 miles trail running
- Sat 2 May
- £35-£36
May the Fourth be with you (original) | Half Marathon
Take on a stunning trail half marathon challenge across the Shropshire Hills, with epic scenery, and a rewarding finish earned mile by mile.
- 13.1 miles trail running + 2474 ft ascent
- Sun 3 May
- £32
The Bluebell Bash | Half Marathon
Be sure to add this trail half through scenic bluebell forests to your spring running calendar. With fully-stocked aid stations, gorgeous scenery and a finisher’s medal, it's for everyone.
- 13.1 miles trail running + 702 ft ascent
- Mon 4 May
- £15-£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!
- 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.
- 13.1 miles trail running + 70 ft ascent
- Sun 10 May
- £15-£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!
- 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.
- 13.4 miles multi terrain running + 897 ft ascent
- Sun 10 May
- £30
Something Wild Festival | Half Marathon
A stunning but tough half marathon trail race taking in the South West Coast Path for runners (and walkers) of all abilities with chip timing and medals for all, plus an uplifting festival weekend!
- 13.1 miles trail running + 2001 ft ascent
- Sat 16 May
- £35-£36
The Shindig in the Shire | Half Marathon
Push your limits on a historic trail run through Ironbridge Gorge with scenic views, testing climbs, and a rewarding finish with great food, drink, and well-earned bling.
- 13.1 miles trail running
- Sat 16 May
- £26-£28
Lincolnshire Run | Half Marathon
Welcome to a 6-hour timed running event where you can run a half marathon at your own pace on an out-and-back route, with fuel stations each lap, and a medal and goody bag at the finish.
- 13.1 miles trail running + 132 ft ascent
- Sat 16 May
- £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!
- 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.
- 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.
- 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.
- 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.
- 13.1 miles trail running + 656 ft ascent
- Sat 23 May
- £22-£34
Catch Me If You Can - Northampton | Half Marathon
Come and join in for the Catch Me If You Can event!
- 13.1 miles trail running
- 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.
- 13.1 miles trail running
- Sun 24 May
- £22-£34
Slow and Steady Wins The Race - Northampton | Half Marathon
Come and join in for the Slow and Steady Wins The Race event!
- 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.
- 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.
- 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.
- 13.1 miles trail running
- Sun 31 May
- £30-£32
Rothwell Cakeathon | Half Marathon
Run. Refuel. Repeat. Take on the Rothwell Cakeathon and earn every slice in this friendly, traffic-free, flat, runnable course with a welcoming, no-pressure atmosphere.
- 13.1 miles trail running
- Sun 3 May
- £37
Tempo Trail Races | Half Marathon
- 13.1 miles trail running + 884 ft ascent