Hardrock 100
Race Day Weather
Warming day, light winds
Runners will face a temperature increase from 47°F at the start to a high of 72°F by race end, with average humidity around 48%. Wind will be light, primarily from the S, contributing minimal resistance. Given the temperature rise, runners should consider pacing adjustments and hydration strategy as the race progresses.
This course climbs 4,587 ft to its high point and back, so we look at it at 2 points, not just the start line. In a typical year, at 9:00/mi, you start at 47° and finish around 8:59 PM in 60°.
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Race Info
The Hardrock 100 is a grueling ultramarathon that challenges runners with a 102.5-mile loop through Colorado's rugged San Juan Mountains. Traversing 4WD roads, dirt trails, and cross-country terrain, the course features a cumulative elevation change of 66,394 feet, with an average elevation exceeding 11,000 feet. Runners navigate 13 major passes between 12,000 and 13,000 feet, culminating at the 14,048-foot summit of Handies Peak. The race honors the area's mining heritage, requiring participants to "kiss the Hardrock," a ram's head painted on a stone, upon completion. Held annually in early July, the event is renowned for its demanding conditions, including steep climbs, snow packs, river crossings, and boulder fields, making it a premier test of endurance and mountaineering skills.
