Heart of Cool Trail Run
Oct 17Cool, CAHalf Marathon, 10K +1
17 mi from The Rubicon, similar trail technicality to The Rubicon, registration open
At a glance
- Date
- Oct 24, 2026
- Location
- Oxbow Reservoir, California
- Elevation gain
- 19,300 ft
- Registration
- Registration closes Oct 22, 2026, via ultrasignup.com
- Official site
- linktr.ee
- Listed from
- UltraSignup
- Last checked
- Oct 5, 2026
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Build my planAbout this race
The Rubicon is a very difficult and remote on and off-trail foot race in the backcountry of the northwestern Sierra Nevada.
Key dates
Registration closes
Oct 22, 2026
Race day
Oct 24, 2026
Pricing
The Requisite
Registration
$0
The Resonant
Registration
$0
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Registration openings and major changes, like a new date or a cancellation.
Entry transfers
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Straight-line distance
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Race planning
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