Hardrock 100
Hardrock 100 race day weather
Cool morning, warming finish
Runners will face a cool start at 47°F, gradually warming to 60°F by the finish. Winds will be light from the W at 6 mph, with headwinds impacting miles 1-11 before shifting to tailwinds during the final segments. As temperatures rise, runners should adjust their pacing strategy, particularly during the significant climbs from miles 19 to 21 and 28 to 32, ensuring adequate hydration in the warmer conditions.
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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About the Hardrock 100
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.
