Date
Sun, 21 Mar 2027
Start
08:00
Venue
100K: Fort Baker to Marinwood Community Center, Marinwood, California
Marinwood, Marin County
Countdown
March
The gentle way into The Big Alta weekend: a 28 km loop with around 1,200 m of climbing, a good first step up toward ultra distance.
Key facts
015.5-hour cutoff
02Mass start, no waves
03Loop starts and finishes at Marinwood Park
Create a free training plan for the The Big Alta 28 km
7-day free trial, no card required
The course
The route
Marinwood
Distance28km
Total climb1,188m
StartElevation
0 kmDrag map to rotate26.4 km
Weather
Late-March, Marinwood
15°CTypical high
8°CTypical low
3°CColdest in 20 years
33%Days with rain
Highs around 15°C and lows around 8°C, but it has dropped to 3°C. Rain on 33% of days.
NASA POWER data, 2006-2025, the week either side of race day
2026 results
Who finishes, and how
#RiderTimeAvg speed
01Tayler Tuttle02:06:3513.3 km/h
02Rena Schwartz02:10:5912.8 km/h
03Alice Goodall02:16:4112.3 km/h
105
Women finishers
3:34:35
Median time
7.8 km/h
Median speed
Women · 2026 results, as published by the organiser.
How fast could you finish?
Get a prediction based on your recent training
Organiser
OrganiserDaybreak Racing and Freetrail
Websitedaybreakracing.com
Instagram@daybreakracing
Running since2024
Training
Training for the The Big Alta 28 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 The Big Alta 28 km plan targets
Typical sessions
28 km with 1,188 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 The Big Alta 28 km plan.
7-day free trial, no card required.
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