Iron Butt Association hosts the Saddle Sore 1000[tm] (a 24 hour 1,000 mile ride), the Bun Burner 1500[tm] (1,500 miles in 36 hours), the Bun Burner Gold[tm] (1,500 miles in 24 hours)
http://www.ironbutt.com/ridecerts/ aici gasiti un tabel cu probele asociatiei
http://www.ironbutt.com/ridecerts/getdocument.cfm?DocID=30 aici gasiti regulile si pasii care trebuie urmati pentru recunoasterea performantei
have phun