the number of entries is often limited. There can be a few reasons for this: narrowness of trails, national parks (where the courses are often set) may limit the number of participants via a permitting process, safety, and environmental concerns. There are many popular races such as the Ultra-Trail du Mont-Blanc in Europe or the Western States Endurance Run in the United States that have been forced to limit entries due to overwhelming demand. Some notable trail races include: Africa Fish River Canyon Ultra Marathon Kalahari Augrabies Extreme Marathon Mount Cameroon Race of Hope Rhodes Trail Run Asia Coast To Coast Night Trail Ultra: Indonesia, since 2015 Japan Mountain Endurance Race Hasegawa Tsuneo Cup (HASETSUNE CUP): 71.5 km (since 1993) Trans Japan Alps Race (TJAR): 415 km (since 2002) Ultra-Trail Mount Fuji (UTMF): 161 km (since 2012) Europe Fruškogorski maraton: (since 1978) Scenic Trail: Tor des Géants: Transvulcania: Ultra-Trail du Mont-Blanc: North America Barkley Marathons: Bear 100 Mile Endurance Run: 100 miles (160 km) Dipsea Race: the oldest trail running event in the US Hardrock Hundred Mile Endurance Run: Leadville Trail 100: Western States Endurance Run: Oceania Kepler Challenge: also includes the Luxmore Grunt (New Zealand) Kokoda Challenge Race: See also Hillwalking IAU Trail World Championships Skyrunning References External links Running by type