| Mid July|
| Breck 100|
| 100 Mile Ultra Endruance|
Boreas Pass, Carter Park, Pacific Tarn, Breckenridge Ski Resort, Copper Mountain
Breckenridge 100 Wikipedia
The Breckenridge 100 is an ultra-endurance mountain bike race held annually in mid July in Breckenridge, Colorado. At the same time the Breck 100 is being held, the organization offer three others options; solo 68 miles, solo 32 miles and a team relay. Initially this race offered just two distance classes, 100 miles (160 km) and 100 km (62 mi) and no awards were presented to those doing the shorter version, it simply offered an easier alternative for those riders not ready to race the full 100 miles. The race once was part of the National Ultra Endurance Series, however, 2012 was the last year this race was in the series.
The sprawling course is nestled between three ski resorts and features a distinct cloverleaf format of three loops that each begin and finish in Carter Park, adjacent to historic downtown Breckenridge. The race crosses the Continental Divide of the Americas three times, once at Wheeler Pass at an elevation over 12,400 ft and twice at Boreas Pass at an elevation of 11,492 ft. The course climbs a total of 13,719 feet, and includes backcountry trails, roads, double track, bike paths, and high mountain stream crossings.