Marin Ultra Challenge
Mar 13, 2027Sausalito, CA50 mi, 50K
33 mi from The Napa Lapa Trail Adventure, by Inside Trail Racing
At a glance
- Last held
- Aug 8, 2026
- Next edition
- 2027 date not announced. Usually held in August.
- Location
- Napa, California
- Distances
- 12 hr, 6 hr, 3 hr
Listed from UltraSignup. Checked Aug 2, 2026.
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Build my planAbout this race
Inside Trail Racing organizes ultramarathon, half marathon, and 10K trail runs throughout the SF Bay Area.
Key dates
Race day
Aug 8, 2026
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Race planning
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