Napa Valley Trail Marathon

Calistoga, CA, USA · March 20, 2027·

53°·61° high·Light·Rain possible

Weather

Race Day Weather

53°at start

64° high

Light

Dry

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Cool start, warming trend ahead

Runners will face temperatures rising from 49°F at the start to 63°F by race end, with humidity around 70%. Light winds from the SW will be a non-factor. It's advisable to pace conservatively in the warming conditions, staying hydrated as the temperature increases.

Race day forecast available in 138 days

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Distance: 26.2mi

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Race Info

Babbling streams will be your soundtrack as you challenge yourself on the lush single-track within Bothe-Napa Valley State Park. The course is a bit challenging with the hills, streams and rocks - which makes it all the more exciting and rewarding. This state park is a local treasure that is untapped by tourists and located just minutes from the area's great restaurants and wineries. The event is limited to 300 participants and sells out every year so don't wait too long to register! Source

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Race weekend

Saturday, March 20

9:00 AMMarathon (26.2 mi)

9:00 AMHalf Marathon (13.1 mi)9:00 AM10K (6.2 mi)

9:00 AM5K (3.1 mi)

Course Map

FAQ

When is the 2027 Napa Valley Trail Marathon?

The 2027 Napa Valley Trail Marathon will be held on Saturday March 20, 2027.

Is the Napa Valley Trail Marathon a Boston Marathon Qualifier?

No, the Napa Valley Trail Marathon is NOT a Boston Marathon qualifier.

What is the time limit for the Napa Valley Trail Marathon?

The time limit for the Napa Valley Trail Marathon is 6 hours.

What will the weather be like for the 2027 Napa Valley Trail Marathon?

The forecast calls for a high of 68°F and a low of 48°F with a 10% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

Historical Weather

Based on 4 years of data

Avg Temp

59°F

L:53° H:64°

RunScore

Conditions

Rain Freq

25%

1 of 4 yrs

Wind5mph

Dew50°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 Napa Valley Trail Marathon Clear conditions throughout the day. 2026	61°/80°	-	54°
2025 Napa Valley Trail Marathon Partly cloudy throughout the day. 2025	53°/59°	-	51°
2024 Napa Valley Trail Marathon Partly cloudy throughout the day with a chance of rain throughout the day. 2024	50°/55°	Light	48°
2023 Napa Valley Trail Marathon Partly cloudy throughout the day. 2023	47°/60°	-	45°

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