Trail running in the UK continues to grow, and the Altra 13 Valleys Ultra is reporting a significant increase in entries ahead of this September’s race.
Taking place in the Lake District on 27 September, the event has seen registrations rise by more than 60% compared with last year, with overall participation expected to increase by 67%. Several of the longer-distance events have also already sold out for 2026, highlighting the continued demand for trail and ultra-running events in the UK.
Based in Keswick, the event offers four distances ranging from 22km to 180km, taking runners through some of the Lake District National Park’s most recognisable landscapes.
While the headline ultra distances attract experienced endurance runners, organisers say the shortest option—the 2 Valleys 22km—has become increasingly popular with runners looking to make the transition from road running to trails.
Unlike many fell races, the route combines roads, tracks and trails, making it a more accessible introduction to off-road running. An eight-hour cut-off also means walkers are welcome alongside runners.
For more experienced athletes, the 22km route offers the opportunity to race over a shorter distance while still experiencing the atmosphere of a major trail running event.
The continued growth of events such as the Altra 13 Valleys Ultra reflects the wider boom in trail and ultra running across the UK, with more runners looking beyond traditional road races for new challenges in the mountains and countryside.
This year’s event takes place on 27 September, with the longer distances already proving particularly popular. Entries for the 22km event remain available.
