Trail Marathons in UK in May 2026
Find trail marathons in UK 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.
- Mon 4 May
- £20-£27
Bank Holiday Madness May | Marathon
Come and join the day of running and aim to complete a midweek marathon within the 7-hour time limit on a scenic course then receive a fantastic medal and goody bag at the finish!
- 26.2 miles trail running
- Sat 9 May
- £53-£55
Magna Carta Summer | Marathon
The Magna Carta 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.
- 26.35 miles trail running + 150 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!
- Trail run
- 5K run
- 10K run
- Half marathon
- Marathon
- + 3 more races
- Sun 10 May
- £40
Something Wild Festival | Marathon
A stunning but tough marathon trail race taking in the South West Coast Path for runners of all abilities with chip timing and eco medals for all, as part of the festival weekend!
- 26.2 miles trail running + 3747 ft ascent
- Sat 16 May
- £139
- 11 charities
Weymouth Trail Marathon
Take on the ‘classic Jurassic’ scenery, coastal sights and tough climbs of this marathon-distance challenge along the stunning coastal path whilst enjoying full support along the way.
- 42 km trail running + 1100 m ascent
- Thu 21 May
- £17-£29
Dun Holm Challenge | Day 1 | 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 marathon is for you! Durham-themed medals too.
- 26.2 miles trail running
- Fri 22 May
- £17-£29
Dun Holm Challenge - Day 2 | 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 marathon is for you! Durham-themed medals too.
- 26.2 miles trail running
- Sat 23 May
- £33-£38
Farmmageddon | Full Marathon
Can you survive Farmmageddon? A fantastic marathon through the lovely grounds of Hyde Hall Farm as part of the Farmmageddon endurance weekend.
- 26.2 miles trail running + 1312 ft ascent
- Sat 23 May
- £17-£29
Dun Holm Challenge | Day 3 | 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 marathon is for you! Durham-themed medals too.
- 26.2 miles trail running
- Sun 24 May
- £40-£42
Get the Hull out of Here | Marathon
Based out of East Hull this 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.
- 26.2 miles trail running
- Sun 24 May
- £17-£29
Dun Holm Challenge | Day 4 | 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 marathon is for you! Durham-themed medals too.
- 26.2 miles trail running
- Mon 25 May
- £17-£29
Dun Holm Challenge | Day 5 | 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 lapped marathon is for you! Durham-themed medals too.
- 26.2 miles trail running
- Sun 31 May
- £55
Lake District Running Festival | Grasmere Gallop 42km Trail Run
A 42K trail run as part of the Lake District Running Festival in an iconic location with a grandstand finish, wooden medal, free event photos and, more importantly, cake...
- 42 km trail running + 1905 m ascent
- Sun 3 May
Tempo Trail Races | Marathon
- 26.2 miles trail running + 1743 ft ascent
- Sat 9 May
Radyr Trail Races: Half Marathon and Marathon | Marathon
- 26.2 miles trail running
- Sat 9 May
Endurancelife | Exmoor | Marathon
- 27.4 miles trail running + 6070 ft ascent
- Sun 10 May
Hardmoors 26.2 White Horse Trail Marathon | Marathon
- 29 miles trail running + 3400 ft ascent