Save This Event For Later Summit Mt. Challenge #3, BRECK MTN ENDURO Breckenridge, CO, Sat Jun 23, 2018 Who's Registered? | Contact Event | Event Website | Google Calendar Start line address: Breckenridge, CO 80424 Presented by Maverick Sports Promotions This is a past event. If you wish to see the details for this event click, "Continue" below. If you are looking for a current event, please search the event calendar .