50K ultra runs in the UK
The shortest of the common ultra distances at just over 30 miles, 50K ultra marathons are the best introduction to ultra running. But the distance is not always the key challenge with ultra runs - the total ascent gives a much better indication of how hard it will be. Select your location to find 50K ultra runs in your area or scroll down to browse events coming up.
Search by month
Search by place
London
South East
South West
East of England
East Midlands
West Midlands
Yorkshire
North East
North West
Scotland
Wales
Northern Ireland
Jersey
50K ultra runs in 2025
Featured events are listed below - select a month/region or the map view to see all events.
- Sat 21 Jun
- £30
Exmoor Perambulation | Ultra Trail Marathon
65th edition! The Perambulation is Exmoor National Park’s iconic traditional self-navigated circular long-distance event dating back over 725 years and now you can run the full distance!
- 30 miles trail running
- Sat 12 - Sun 13 Jul
- £85-£270
Race to the Stones
Conquer Britain's oldest trail, the ancient Ridgeway, at the UK's biggest ultramarathon as you race towards the 5000-year-old Avebury Standing Stones. Back for the 12th Year Running!
- 50K ultra run 2
- 100K ultra run 3
- Sat 12 - Sun 13 Jul
- £31.99-£251.99
XTERRA Snowdonia Trail Marathon Eryri Events
Welcome to the XTERRA Snowdonia Trail Marathon Eryri, a stunning Trail Marathon, Ultra Marathon, Half Marathon, 10K, and 24hr event starting and finishing in Wales' outdoor capital, Llanberis.
- 10K run
- Half marathon
- Marathon
- Ultra run 2
- Sat 12 Jul
- £139
- Entries close soon
North Downs 50 Ultra Challenge | 50km
Join a mid-summer North Downs 50 Challenge! This looped route is set in an area of outstanding natural beauty of the Surrey Hills, taking in chalk ridges and ancient woodlands.
- 50 km trail running + 830 m ascent
- Sat 19 - Sun 20 Jul
- £39-£199
Gower Peninsula Ultra Challenge
A new Ultra Challenge for this year, set on the stunning Gower Peninsula – the UK’s first Area of Outstanding Natural Beauty and famous for its golden beaches.
- 100K ultra run 2
- Ultra run
- 50K ultra run 2
- Marathon
- Multi-terrain run
- + 1 more race
- Sat 2 Aug
- £139
South West Coast 50 Ultra Challenge | Full 50km
The 50km ultra option from Dunster Castle, along the South West Coastal Path to a picnic in Exmoor National Park with awesome views over the Bristol Channel to finish back at Minehead with a medal!
- 50 km trail running + 1600 m ascent
- Sun 31 Aug
- £55
Something Wild Festival | Summit Wild Ultra
A stunning ultra trail race taking in the South West Coast Path on a fully-marked route with chip timing and eco medals for all, as part of the festival weekend!
- 50 km trail running
- Fri 12 - Sun 14 Sep
- £39-£199
Thames Path Ultra Challenge
England’s greatest river provides a fantastic backdrop for an unforgettable 'festival' challenge weekend, with distances from 10km right up to 100km there’s a Thames Challenge for everyone!
- 100K ultra run 2
- 50K ultra run 2
- Trail run 4
- Ultra run
- 10K run
- + 4 more races
- Sat 13 Sep
- £60-£62
Bewl Water Autumn | Ultra
Scenic mixed-terrain route around Bewl Water on undulating rural wooded trails and quiet country lanes. The marathon course was previously rated one of the top UK marathons.
- 50 km trail running
- Sat 20 Sep
- £60
Peak District Challenge | Bronze Challenge 50K
Take in the valleys of the dark peak and the scenic trails of the white peak and reach the highest point at 464m, with a 12-hour target time which is generous for runners and a brisk pace for hikers.
- 50 km trail running + 1140 m ascent
- Sat 27 Sep
- £139
Chiltern 50 Ultra Challenge | Full 50km
The full 50K route of the Chiltern 50 Ultra Challenge starts from basecamp in Henley on a loop via Greys Court, the Ridgeway, Shakespeare's Way, The Chilterns and Hambleden Village to a party finish!
- 50 km trail running + 920 m ascent
- Sat 11 Oct
- £139
Kent Downs 50 Ultra Challenge | 50km
Set in an Area of Outstanding Natural Beauty offering dramatic views, vibrant communities, a rich historic heritage, and diverse wildlife and habitats – featuring the North Downs Way National Trail.
- 50 km trail running + 1000 m ascent
- Sat 11 Oct
- £95-£216
William Wallace 50km Ultra
You will step onto Scotland’s most storied battlefields, where warriors once fought for freedom, embarking on an epic journey through history, treading in the footsteps of legends. Are you ready?
- 50 km multi terrain running + 602 m ascent
- Sun 19 Oct
- £49.50
Brenig Way 50K Trail
This regional marked footpath of 32 miles winds it's way through some beautifully remote upland scenery. Start at the town of Corwen in the Dee Valley, and follow the signage up the Dee Valley.
- 50 km trail running + 1450 m ascent
- Sat 1 Nov
- £35.50-£37.50
Catherine Wheel Canter | Ultra Marathon
Welcome to the Fireworks Festival of Running! Come and tackle the track to see whether you can complete more than a marathon over multiple laps of the 400m circuit.
- 50 km track and field
- Sat 1 Nov
- £35.50-£37.50
Guy Fawkes Gallop | Ultra Marathon
Welcome to the Fireworks Festival of Running! Come and tackle the track to see whether you can complete more than a marathon over multiple laps of the 400m circuit.
- 50 km track and field
- Sat 25 Apr 2026
- £52.50
North Wales 50K
This event gives participants the opportunity to take in a runnable, beautiful route which follows the North Walian coastline between Prestatyn and Bangor.
- 50 km trail running + 2700 ft ascent
- Sun 10 May 2026
- £60
Shires and Spires | Ultra
The circular 35 mile ultra is a registered UTMB index race with 20.2 miles of cross country trails and 14.3 miles on road through wonderful countryside. Fully tracked and interactive
- 35 miles multi terrain running + 2052 ft ascent
- Sat 23 May 2026
- £33-£38
Farmmageddon | Ultra Marathon
Can you survive Farmmageddon? Run an ultra over a fantastic 5.3K loop through the lovely grounds of Hyde Hall Farm as part of the Farmmageddon endurance weekend.
- 32 miles trail running
- Sat 23 Aug
- £38-£46
Run the Borders | 50K Ultra
Starting alongside those taking on the full route, runners and walkers alike will feel the buzz of the startline before running past all four of the route's ruined abbeys to finish at Jedburgh.
- 50 km trail running
50K ultra runs near you
Select your location for 50K ultra marathons in your area.