Bighorn Trail Run 100 is held on Saturday, June 19, 2027 in Dayton, WY. The start time is to be confirmed by the organizer. Registration is currently open — use the official registration link above to enter directly with the organizer.

Always confirm the date, start time, entry fee and course details on the official event site before you travel or register, as race information can change after a listing is published. For discipline-specific guidance on what to expect and how to prepare, see the Ultra Marathons sector guide.