Course
A 100-mile loop through the San Juan Mountains between Silverton, Telluride, Ouray and Lake City, run counter-clockwise in 2027, with 66,882 feet of total elevation change. Entry is by lottery.
Key dates
- ✓Entries openedThu 1 Oct 2026
- ✓Entries closedWed 14 Oct 2026
- ★Race dayFri 9 Jul 2027
About
The Hardrock Hundred Mile Endurance Run is a 100-mile loop through the San Juan Mountains of Colorado, linking the old mining towns of Silverton, Telluride and Ouray with an average elevation over 11,000 feet. Finishers must kiss the Hardrock, and entry via its famously oversubscribed lottery is one of the hardest tickets in ultrarunning.
Save Hardrock 100 to your season and RunCalendar reminds you the morning entries open and before they close. Free on iPhone, no account needed.
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A confirmed date shows its day; a provisional one shows only its month, because we won't claim a day we don't have. This page is rebuilt every night from the RunCalendar catalogue.