The county came third in the list compiled by outdoor experts at Blacks, scoring 8.17 out of 10.
Fell running is an extension of off-road running, where runners take on mixed terrains and mountains as quickly as possible.
The sport requires resilience and grit, and is becoming increasingly popular, with more than 440,000 runners participating between November 2023 and 2024.
Cumbria has more than 1,000 running trails, including Fairfield Horseshoe and Kentmere Horseshoe.
There are also well-known peaks such as Helvellyn.
There are many fell running events in Cumbria, such as the Buttermere Shepherd’s Meet, which takes place on October 26.
There are also several fell running clubs, such as the Cumberland Fell Runners.
Natalie Wolfenden, outdoor enthusiast and author at Blacks, said: “The UK is home to many fantastic fell running destinations that cater for all abilities, from the high peaks of the Peak District and Lake District to the scenic routes of the South Coast.
“Although fell running may seem like a natural progression from road and trail running, it is important to ensure you have the correct equipment before taking to the hills.
“Fell runners often encounter unsteady terrain, so a good pair of off-road running shoes with good grip and ankle support is recommended.
“You should also prepare for any weather conditions.
“Wearing base layers allows you to regulate body temperature and manage moisture, keeping you comfortable during your trek.
“You should also pack a lightweight waterproof jacket in case of any wet weather.”
The experts took into account the number of trails, the average rating for trails, the population size, and the number of trails per 100,000 people.
Based on these factors, they gave each area a score out of 10.
Pembrokeshire and Gwynedd took the top two spots on the list.
