Ultramarathon by distance: 50 km | 50 m | 100 km | 100 miles | Other distances 26 miles - 100 miles
Ultramarathon by time: 24 hour races | 48 hour races | 72 hour races | marathon | ultramarathon | multiday races
Multiday race by time: 5 Day Races | 6 Day Races | 7 Day Races | 10 Day Races ".."
Multiday race by distance: 700 miles | 1000 miles | 1300 miles | 3100 miles; ".."
