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.
Featured events are listed below - select a month/region or the map view to see all events.
A trail ultra that is flat and fast and perfect for a PB and also brilliant for a first-timer or the runner who wants to do their own pace plus bespoke medal and finish line treats.
Take on a 6-lap course through the stunning South Yorkshire Park country park of Rabbit Ings and reach the finish to hang your finisher's medal around your neck with pride.
Fast, flat, PB-grabbing ultra on traffic-free trails and the canal towpath with a bespoke medal and treats at the finish line. First-time ultra runners welcome.
Fast, flat, PB-grabbing event on good trail and canal towpath with a bespoke medal and treats at the finish line.
Enjoy a trip up the Leeds and Liverpool Canal this spring over a range of distances, all along the flat and even towpath. This event is perfect for runners of all abilities.
A great opener to the full Ultra Challenge season! From the racecourse basecamp 2000 adventurers will head out on looped routes with fantastic panoramic views of the city and surrounding countryside.
Make it an active Easter on a challenge from Windsor Racecourse on looped routes through the Great Park with fantastic views of the castle, to Runnymede along the Thames Path.
This event gives participants the opportunity to take in a runnable, beautiful route which follows the North Walian coastline between Prestatyn and Bangor.
The first half of the Isle of Wight circuit explore 52km of scenic coastal trails, enjoy spectacular coastal views along the undulating route with plenty of rest stops to keep you well fuelled.
A NEW looped route setting out from the Chale basecamp, that gives you the best of the Island’s dramatic scenery along famous southern coastline to the iconic ‘Needles’.
Starting in Cowes, follow a clockwise route along the eastern side of the Isle of Wight, enjoying superb coastal views en route to the finish line at Chale.
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.
58km of beautiful trail, with ups and downs giving over 1600m of ascent on a gorgeous coastal route which visits some of the highlights of the Jurassic Coast.
A marathon distance challenge departing from Weymouth, visiting Chesil Beach and the West Dorset Heritage Coast en route to the finish line at Bridport.
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!
Walk, jog or run the journey from Capital to Coast, over the North and South Downs. A fully supported challenge leaving Richmond-upon-Thames for the finish line at Brighton Racecourse.
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.
Taking in the two Munro summits of Cairn a Chlamain and Ben Dearg along with Glen Tilt and the vast forests of Blairuachdair, the Full Tilt Ultra has it all. Are you up to the challenge?
Take on the full 100km challenge, starting from Kendal Base Camp, a fully supported ultra. making a glorious loop of the spectacular south Lakes.
In its fifth 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?
Take on the first half of the full 100km challenge, starting from Basecamp in Kendal to the far side of the beautiful Lake Windermere.
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.
Take on the second half of the 100km route, opting to start on Saturday evening or Sunday morning, starting at Windermere, exploring the Southern Lakes en route to the finish at Kendal.
A coastal trail ultra through the ancient village of Bosham towards Chichester Harbour with panoramic views of this AONB, to finish at the fantastic basecamp with food and bars.
Head through the historic town of Arundel and witness the impressive Arundel Castle as you meander along the River Arun, across the South Downs in breathtaking surroundings.
The original Snowdonia Ultra Marathon. A beautiful route boasting stunning views, a hearty ascent of Yr Wyddfa (Snowdon) and a thrilling 7km descent to a heroes' welcome at the finish line!
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.
Starting in Lewknor, this event presents a varied and scenic route steeped in history. Crossing England’s longest river at the halfway mark, the course finishes at the iconic Lattin Down basecamp.
Yr Wyddfa (Snowdon) is the highest mountain in England and Wales. Your challenge is to ascend and descend as many times as possible in 24 hours - solo or as a relay team.
Sticking to higher ground, you'll pass through a surprisingly isolated stretch of southern England and enjoy dramatic views before finishing with the full 100K at the awesome Avebury Standing Stones.
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.
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.
The full distance option of the South West Coast 50 Challenge from basecamp next to Dunster Castle, along the South West Coastal Path to a picnic in Exmoor National Park, finishing back at Minehead.
A stunning ultra trail race taking in the South West Coast Path on a fully-marked route with chip timing and medals for all plus an uplifting festival vibe!
The first half option of the Thames Path Challenge from leafy South West London on the River Thames along the river to Hampton Court to finish at Runnymede for a big celebration finish and hot meal.
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.
The second half option of the Thames Path Challenge from Runnymede along the meandering river through Cookham to Henley-on-Thames, home of the regatta, to a celebration finish and family BBQ.
The full distance option of the Chiltern 50 Challenge from basecamp in Henley on a loop via Greys Court, the Ridgeway, Shakespeare's Way, The Chilterns and Hambleden Village.
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.
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.
Select your location for 50K ultra marathons in your area.