50K ultra runs
A 50K ultra is the most popular way to step beyond the marathon. Events combine endurance, adventure and achievable distances, making them ideal for first-time ultra runners. Use the filters to find 50K ultras by date, location or terrain. Read more
A 50K ultra run covers just over 31 miles, offering a manageable introduction to ultra-distance running without the commitment of longer events. Many 50K ultras take place on scenic trails, rolling countryside or multi-loop courses, making pacing and nutrition easier to manage.
These events are popular with marathon runners looking for a new challenge, as well as trail runners keen to explore longer distances. You’ll find beginner-friendly options with generous cut-off times alongside more technical courses for experienced off-road runners.
Use the filters to narrow your search by date, location or route type — to find your perfect ultra.
If you’re aiming to go further, you can also explore our 100K ultras or 100-mile ultra events once you’ve built confidence at this distance.
Want to read more? Read the guides, tips and advice from our blog.
Got questions? Read our FAQs for answers.
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Map view50K ultra runs 2026–2027
Discover 50K ultras across the UK and beyond and get ready for your next start line.
- Sun 10 May
- £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
- Sun 10 May
- £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
- Sun 10 May
- £23-£35
The Spring Lucky Dip Run | 50K
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!
- 50 km trail running
- Sat 16 - Sun 17 May
- £39-£199
Jurassic Coast Ultra Challenge
Walk, jog or run along the spectacular UNESCO World Heritage coastline from Corfe Castle past Lulworth Cove and Durdle Door, with full support, welcoming base camp and finish line celebration!
- Trail run 2
- 50K ultra run 2
- 100K ultra run 2
- Marathon
- Ultra run
- + 1 more race
- Sat 16 May
- £23-£35
Rocky at 50 Run | 50K
Come and celebrate 50 years since the release of the iconic Rocky film! Have you got the Eye of The Tiger, the guts to get the glory and the will to rise up to the challenge and run 50K?
- 50 km road running
- Sun 17 May
- £85
Keswick Mountain Festival | adidas TERREX 50K Trail Ultra Marathon
The ultra is graded ‘very hard’ and one to get into your ultra running calendar if you’re looking for UTMB index runs where you can bag points. Includes Full Weekend Festival Ticket in the price!
- 50 km trail running + 1800 m ascent
- Thu 21 May
- £15-£135
Dun Holm Challenge | Day 1
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 is the run for you! Themed medal too!
- Trail run
- 5K run
- 10K run
- Half marathon
- Marathon
- + 4 more races
- Fri 22 May
- £17-£29
Dun Holm Challenge - Day 2 | 50K
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 50K is for you! Durham-themed medals too.
- 50 km trail running
- Sat 23 May
- £15-£29
Dun Holm Challenge | Day 3
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 is the run for you! Durham-themed medal too.
- Trail run
- 5K run
- 10K run
- Half marathon
- Marathon
- + 3 more races
- Sat 23 May
- £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 May
- £22-£34
Catch Me If You Can | Northampton | 50K
Run it your way, from 5k to ultra, at your own pace, on a looped scenic Northampton trails. Inclusive, flexible, and rewarded with an amazing medal every time.
- 50 km trail running
- Sun 24 May
- £22-£34
Slow and Steady Wins The Race | Northampton | 50K
Walk, jog or run a 50K ultra on a flat, traffic-free, looped route, enjoy stunning Washlands trails, and earn a well-deserved medal and goody bag.
- 50 km trail running
- Sun 24 May
- £17-£29
Dun Holm Challenge | Day 4 | 50K
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 50K is for you! Durham-themed medals too.
- 50 km trail running
- Mon 25 May
- £17-£29
Dun Holm Challenge | Day 5 | 50K
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 50K is for you! Durham-themed medals too.
- 50 km trail running
- Fri 29 May
- £15-£27
Midweek Medal Madness | Leons Birthday Run | 50K
Come and join this May Midweek Medal Madness event, where runners will also be celebrating Leon's Birthday!
- 50 km road running
- Sat 30 May
- £22-£34
Rocky at 50 Run | Wales | 50K
Come and celebrate 50 years since the release of the iconic Rocky film! Have you got the Eye of The Tiger, the guts to get the glory and the will to rise up to the challenge and run 50K?
- 50 km road running
- Sun 31 May
- £36-£38
Circuit Du Sore Legs | Ultra Marathon
In its sixth year! Come take on the challenge of the track at Wodson Park. Do you have it in you to complete your distance on a 400-metre athletics track?
- 50 km track and field
- Sat 6 - Sun 7 Jun
- £39-£199
Lake District Ultra Challenge
Take on England’s finest countryside at your own pace with stunning views all the way, featuring the Garburn Pass, historic Ambleside, a halfway point by Lake Windermere, forests and nature reserves.
- Trail run 2
- 50K ultra run 2
- 100K ultra run 2
- Marathon
- Sat 6 Jun
- £53.50
The Llangollen 50K
A truly beautiful area of North Wales! The route uses two way-marked 15-mile linear routes either side of the river, to create a spectacular, challenging excursion in and above the valley.
- 50 km trail running + 5435 ft ascent
- Sat 6 Jun
- £23-£35
Strawberry Shortcake Scamper | 50K
Who remembers the character Strawberry Shortcake and all her adorable friends like Orange Blossom and Lemon Meringue?! Here's your chance for a medal of her for your 50K!
- 50 km road running
- Sun 7 Jun
- £23-£35
The Summer Lucky Dip Run | 50K
Come and join the Summer 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!
- 50 km road running
- Fri 12 Jun
- £15-£27
Midweek Chasing Numbers June | 50K
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.
- 50 km trail running
- Sat 13 Jun
- £60-£62
Bewl Water Summer | Ultra
Scenic mixed-terrain route around Bewl Water on undulating rural wooded trails and quiet country lanes. The marathon on the same day was previously rated one of the top UK marathons.
- 50 km trail running + 1500 ft ascent
- Sun 14 Jun
- £23-£35
Labyrinth 40th Anniversary Run | 50K
Come and celebrate the 40th anniversary of the iconic film released in 1986! A cult classic from the 80s, one of Charlotte's favourite films, and who doesn't love David Bowie as the Goblin King!
- 50 km road running
- Sat 20 Jun
- £60-£185
Race to the King
Take on a challenge fit for royalty in this epic ultramarathon taking in the South coast, South Downs Way, and Monarch’s Way over your choice of distance from a 30km loop up to a non-stop 100km!
- 50K ultra run 2
- 100K ultra run
- Trail run
- Charity ultra
50K ultra marathon blog
Guides, tips and advice on running a 50K ultra.
- 10 mins read
Race 101: the 13 Valleys Ultra
Introducing the 13 Valleys Ultra plus the event's shorter distance options, helping you to push your limits and get involved!
- 8 mins read
10 best ultra marathons in the UK
Take on an epic endurance challenge with one of the most popular ultra runs in the UK, from traditional fell runs to the UTMB World Series!
50K ultra marathon FAQs
Answers to the most common questions about running a 50K ultra.
A 50K ultra run is a race of approximately 31 miles, making it the shortest and most common ultra-distance event.
Yes — many runners choose a 50K as their first ultra thanks to achievable distances, generous cut-offs and supportive atmospheres.
Many 50K events are trail-based, but some use mixed terrain or looped courses. Check event details for surface and elevation.
50K ultra runs near you
Select your location for 50K ultra marathons in your area.