In 152 days · Sat, Mar 20, 2027
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Saturday, March 20th, 2027
3801 St Helena Hwy, Calistoga CA
Half · 5K · Marathon · 10K
38–59°F · some rain risk
See last 10 years
On this date: rain 3 of the last 10 years
2026
52–84°F
dry
2025
36–55°F
dry
2024
41–62°F
dry
2023
34–51°F
dry
2022
33–63°F
dry
2021
33–52°F
dry
2020
31–55°F
dry
2019
39–51°F
rain
2018
42–46°F
rain
2017
45–56°F
rain
Best months to race in California →
Race-day forecast says layers
38°F at the start.
Gloves, ear warmers, throwaway layers, hand warmers — delivered before race day.
About this race
Event Overview
- Date: 2027-03-20
- Location: 3801 St Helena Hwy, Calistoga, CA
- Event Types: Marathon, Half Marathon, 10K & 5K
- Participants Limit: 300
Course Details
- Scenery: Babbling streams will be your soundtrack as you challenge yourself on the lush single-track within Bothe-Napa Valley State Park.
- Difficulty: The course is a bit challenging with hills, streams, and rocks which makes it all the more exciting and rewarding.
- Location Perks: This state park is a local treasure that is untapped by tourists and located just minutes from the area's great restaurants and wineries.
- Registration: The event sells out every year, so don’t wait too long to register!
Important Note
- Event Association: This event is in no way associated with the Napa Valley Marathon (road race) scheduled for March 7, 2027.
Registration Link
- Sign Up: Click here to register
Course map
Train with a club
Run clubs near Calistoga to train with before race day.
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