California · 50K · 30K · 1/2 Marathon
Mt. Tam Trail Run
Mt. Tam Trail Run is a 50K, 30K, 1/2 Marathon and 10K event held in Stinson Beach, California. Its next confirmed date is Saturday, November 7, 2026. About 500 runners take part across all distances.
- Race day
- November 7, 2026
- Location
- Stinson Beach, CA
- Field size
- ~500 runners
Race details
- Date
- Saturday, November 7, 2026
- Location
- Stinson Beach, California
- Distances
- 50K, 30K, 1/2 Marathon, 10K
- Field size
- About 500 runners
- Course
- 6000 ft gain
- Registration
- ultrasignup.com
- Official website
- insidetrail.com
Registration, course & weather
- Registration status
- Registration status as last checked September 28, 2026: sold out
- Start time
- 7:30 AM PST
- Course profile — 50K
- Loop course; Mostly trail, some road; 6000 ft gain (official course data)
- Course profile — 30K
- Loop course; Mostly trail, some road; 3900 ft gain (official course data)
- Course profile — Half Marathon
- Loop course; Mostly trail, some road; 2800 ft gain (official course data)
- Course profile — 10K
- Loop course; Mostly trail, some road; 1600 ft gain (official course data)
- Typical race-day weather
- about 45°F at the start, 64% humidity, 6 mph wind (based on the 2024 race day, measured near the city center rather than the exact start line; Open-Meteo, checked September 28, 2026)
About the Mt. Tam Trail Run
Mt. Tam Trail Run is a trail race series (10K, Half Marathon, 30K, 50K) starting and finishing at Stinson Beach, climbing into Mt. Tamalpais State Park and the Marin Headlands. Run by Inside Trail Racing, the field is capped at 500 runners across all distances and known for steep early climbing, technical singletrack, and ocean views.
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Guides from the RaceRove blog
- 8 min read How to Choose the Best Half Marathon for a PR, Racecation or 50-State Challenge The best half marathon depends on what you want from it. How to choose a course for a personal record, a race worth travelling for, or an efficient stop on a 50-state challenge.
- 7 min read How to Find a 5K, 10K, Half Marathon or Marathon Near You A practical way to find running races near you: pick a distance, decide how far you'll travel, read the listing properly and confirm the details before you register.
- 9 min read How to Run a Race in All 50 States How to plan a 50-state running challenge: set your own rules, group states into trips, build a calendar around the seasons, budget for it and keep track of every finish.
- Blog All guides Planning advice for finding, choosing and travelling to races.
Mt. Tam Trail Run: common questions
- When is the Mt. Tam Trail Run?
- The next confirmed date is Saturday, November 7, 2026.
- Where is the Mt. Tam Trail Run held?
- In Stinson Beach, California.
- What distances does the Mt. Tam Trail Run offer?
- 50K, 30K, 1/2 Marathon and 10K.
- How many people run the Mt. Tam Trail Run?
- About 500 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the Mt. Tam Trail Run?
- Registration is handled by the organiser at ultrasignup.com. Entry fees, caps and deadlines are set there.
- Is registration open for the Mt. Tam Trail Run?
- Registration status as last checked September 28, 2026: sold out.
- What time does the Mt. Tam Trail Run start?
- 7:30 AM PST.
- What is race-day weather usually like at the Mt. Tam Trail Run?
- about 45°F at the start, 64% humidity, 6 mph wind (based on the 2024 race day, measured near the city center rather than the exact start line; Open-Meteo, checked September 28, 2026).
Plan this race in RaceRove
Save it to your plan, compare it with other races, check typical race-day weather and track your 50-state progress in the interactive app.