Date
Sat, 7 Nov 2026
Start
08:00
Venue
Stinson Beach Park, Stinson Beach, CA
Stinson Beach, Marin County
Countdown
November
A half marathon with real hills in it: 21 km out of Stinson Beach and around 850 m of climbing. A good step up from the road for anyone ready to try trails.
Key facts
01Only registered runners may take part
02Entries cannot be exchanged
Create a free training plan for the Mt. Tam Trail Run 21 km
7-day free trial, no card required
The course
The route
Stinson Beach
Distance21km
Total climb853m
StartElevation
0 kmDrag map to rotate20.3 km
Weather
Early-November, Stinson Beach
18°CTypical high
10°CTypical low
5°CColdest in 20 years
19%Days with rain
Highs around 18°C and lows around 10°C, but it has dropped to 5°C. Rain on 19% of days.
NASA POWER data, 2006-2025, the week either side of race day
2023 results
Who finishes, and how
#RiderTimeAvg speed
01Avery Lambrite2:17:579.1 km/h
02Haven Lambrite-Dodge2:19:459.0 km/h
03Anna Henning2:20:178.9 km/h
17
Women finishers
2:52:17
Median time
7.3 km/h
Median speed
Women · 2023 results, as published by the organiser.
How fast could you finish?
Get a prediction based on your recent training
Organiser
Training
Training for the Mt. Tam Trail Run 21 km
We don't do generic plans. We combine deep knowledge of this race's demands with your recent training, then build a plan with you that progresses as you do.
Beina integrates directly with your existing tools to understand your current fitness, and synchronise your planned sessions.
Intervals.icuWhat a Mt. Tam Trail Run 21 km plan targets
Typical sessions
21 km with 853 m of climbing
Time on feet and fatigue resistance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long runs that build time on your feet
Tempo and threshold sessions to hold race pace
Back-to-back weekend runs for fatigue resistance
Not a generic schedule
Typical sessions
Built from your current fitness and the time you actually have
Adapts every week as Beina learns how you respond
Syncs your sessions straight to Garmin and Wahoo
One clear next session, never a wall of spreadsheet
Entries open now
Get your Mt. Tam Trail Run 21 km plan.
7-day free trial, no card required.
Other races at Mt. Tam Trail Run
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