ARRS - Association of Road Racing Statisticians

Working Groups / Ultramarathons

This group focuses on races beyond the marathon distance. Records and rankings are kept for the following standard distances: 30 miles, 50km, 40 miles, 50 miles, 100km, 100 miles, 200km, 24 hours, 48 hours, 6 days, and 1000 miles.


Records and Rankings

Race Histories

Working Group Members