Challenging participants to push their limits
Threshold Sports organise epic endurance events across the UK, focusing on challenging participants to push their limits - their moto is 'We believe More Is In You'. Their main events include:
- Threshold Trail Series - weekend-long ultramarathons in spectacular British landscapes with distances from 50km to 100km.
- Endure24 - 24-hour trail races held in Reading and Leeds where participants complete as many 8km laps as possible within the time limit.
Events cater to a wide range of participants, from first-timers to experienced athletes, emphasising inclusivity and personal achievement.
Threshold Trail Series
Looking for an ultra run in epic scenery? You've come to exactly the right place!
- Sat 20 Jun 2026
- £50-£150
Race to the King
Take on a challenge fit for royalty in this epic ultramarathon along the South Downs Way and Monarch’s Way. Choose from two unique 50km loops – or tackle both in a non-stop 100km challenge!
- 100K ultra run
- 50K ultra run 2
- Trail run
- Ultra run
- Sat 11 - Sun 12 Jul 2026
- £80-£245
Race to the Stones
Conquer Britain's oldest trail, the ancient Ridgeway, as you race towards the 5000-year-old Avebury Standing Stones.
- 50K ultra run 2
- 100K ultra run 3
Fixed time runs
How far can you run in 24 hours? It's time to find out.
- Sat 6 - Sun 7 Jun 2026
- £80
Endure24 | Reading
The UK’s favourite 24-hour trail race! Epic, Brutal, Relentless. Race against the clock to tackle as many laps of the iconic course as you can. How far can you go in 24 hours?
- 24 hrs multi terrain running
- Sat 27 - Sun 28 Jun 2026
- £80-£130
Endure24 | Leeds
The north's favourite 24-hour trail race! Epic, Brutal, Relentless. Race against the clock to tackle as many laps of the iconic course as you can. How far can you go in 24 hours?
- 24 hrs multi terrain running + 102 m ascent