Event Information

 Portland, United Kingdom
29 March 2025

Oner 2025

Prepare to take on one of the UK’s most grueling ultra-marathons—The Oner, an 82-mile, non-stop endurance race that pushes limits and inspires greatness. Set against the stunning backdrop of the UNESCO World Heritage Jurassic Coast, this event is the ultimate test of physical and mental strength. Starting at midday on 30th March 2025, participants

Epic Endurance Oner

ITRA Points
Itra Images
Mountain Level
  2
Finisher Level
  500
National League

Course details

 Race Date: 2025/03/29
 Start Time: 12:00:00
 Participation: Solo
 Distance: 139.48
 Elevation Gain: +3128
 Elevation Loss: -3128
 Time Limit: 24:0:0
 Number of Aid Stations: 9
 Number of Participants: 100
 
 

About the Race

The Oner – Jurassic Coast Ultra Challenge Prepare to take on one of the UK’s most grueling ultra-marathons—The Oner, an 82-mile, non-stop endurance race that pushes limits and inspires greatness. Set against the stunning backdrop of the UNESCO World Heritage Jurassic Coast, this event is the ultimate test of physical and mental strength. Starting at midday on 30th March 2025, participants have 24 hours to complete the entire route, navigating rugged coastal trails, steep climbs, and breathtaking vistas. With over 10,000 feet of elevation gain, the course promises to challenge even the most experienced ultrarunners. Event Highlights Distance: 82 miles (132 km) Elevation Gain: Approx. 10,000 ft (3,048 m) Time Limit: 24 hours Location: Jurassic Coast, UK Checkpoints: Fully stocked and strategically placed every 10–15 km to ensure participants are well-supported. Checkpoint Support Each checkpoint is fully equipped with: Hydration: Water, squash, and Coca-Cola. Fuel: Bananas, oranges, watermelon, energy bars, jelly babies, salty snacks, and filled rolls. Midpoint Hot Food: The halfway checkpoint offers hot meals to keep participants energized. Medical Assistance: Trained medics are available at checkpoints to handle any issues. Transport for Retired Participants: Support vehicles are available for those who need to withdraw from the race. At the finish line, a bespoke finisher’s medal and a warm bowl of homemade soup await every participant who completes this epic challenge. Relay Option For those looking to share the experience, relay teams are welcome. Teams can divide the course into legs, using checkpoints for seamless handovers. Whether you're chasing personal glory or looking for the ultimate endurance test, The Oner is a race that will push you beyond your limits and reward you with an unforgettable achievement.

The Oner.