Miwok 100K

Stinson Beach, CA, USA · May 1, 2027
partly-cloudy-day51°·63° high·Breezy·Dry
8
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Race Day Weather

partly-cloudy-day
51°at start
63° high
Breezy
Dry

Cool start, warming finish

Runners will face a cool start at 51°F, warming to 62°F by the finish in the valley. Wind from the west will be a factor, with speeds reaching 14 mph and headwinds expected during miles 19-26. Runners should pace conservatively early on and stay hydrated as humidity hovers around 66%, particularly during the climbs from miles 1 to 3 and 14 to 17.

Race day forecast available in 165 days
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Pace Calculator

Distance: 62.1mi
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Race Info

The Miwok 100K Trail Race is a 62.2 miles (100.1 km) long ultramarathon that takes place annually in southern Marin County, California, typically on the first Saturday of May.

The race starts and ends in the town of Stinson Beach. Almost all of the course is on fire roads and single-track trails, first to the south of Stinson Beach and then to the north. Runners climb a total of approximately 11,800 feet (3,600 m).
Wikipedia

FAQ

When is the 2027 Miwok 100K?

The 2027 Miwok 100K will be held on Saturday May 1, 2027.

What is the time limit for the Miwok 100K?

The time limit for the Miwok 100K is 15.5 hours.

What will the weather be like for the 2027 Miwok 100K?

The forecast calls for a high of 61°F and a low of 51°F with a 2% chance of rain.

Historical Weather

Based on 4 years of data
Avg Temp
54°F
L:52° H:61°
RunScore
8
Conditions
Rain Freq
50%
2 of 4 yrs
Wind12mph
Dew46°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
cloudy
54°/62°-
8
2025
partly-cloudy-night
52°/64°-
7
2024
cloudy
49°/56°Light
6
2023
cloudy
53°/62°Light
8