2027 Napa Valley Marathon - Mar 7 Countdown

Q: When is the 2027 Napa Valley Marathon and what time does it start?

The 2027 Napa Valley Marathon is held on Sunday, March 7, 2027. The full marathon starts at 7:30 a.m. Pacific Time at the Silverado Trail and Brannan Street in Calistoga, with the half marathon (a separate distance) starting earlier at 7:00 a.m. from Conn Creek. Because the race is point-to-point, runners ride shuttle buses from the Napa finish area up to the Calistoga start, so plan to be at the bus pickup well before dawn.

Q: Is the Napa Valley Marathon course flat or downhill?

It is best described as a gentle net downhill, not flat. The route loses about 867 ft (264 m) and climbs about 564 ft (171 m) for a net drop near 303 ft (92 m), so the overall trend is downhill but it rolls along the way. The famously low turn count — only about four turns in the whole race — and the long straight run down the Silverado Trail make it feel fast and rhythmic. Use the downhill to hold goal pace comfortably rather than to over-stride; the pace calculator helps you plan splits for a net-downhill course.

Q: What is the time limit for the Napa Valley Marathon?

The full marathon has a 6-hour course time limit, which works out to roughly a 13:44 per mile (8:32 per km) pace. There is a firm intermediate cutoff: a mandatory sweep shuttle picks up runners at mile 22.7 at 12:45 p.m. sharp, so you need to be on pace through the back half. Slower runners should bank a little time on the gentle early downhills rather than relying on a late surge.

Q: How do I register and how much does it cost?

Registration is handled online through the official Napa Valley Marathon site, with the 2027 entry window opening on June 24. There is no lottery — entry is first-come, first-served, and each distance reliably sells out, so register early. The standard full-marathon entry has run around $205 in recent years, with prices stepping up as the field fills. Note the marathon and half marathon are separate distances on the same morning.

Q: How big is the Napa Valley Marathon and is it just a marathon?

It is a smaller destination race rather than a big-city event: the full marathon drew about 1,949 finishers in 2026. It is no longer marathon-only — the weekend now also includes a half marathon (which starts at Conn Creek and is actually the larger field) plus a 5K, though each distance is timed and ranked separately. The intimate scale, rural Silverado Trail setting and wine-country backdrop are a big part of the appeal, but it also means a smaller crowd and a logistics-heavy point-to-point format.

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Race Information

Race	2027 Napa Valley Marathon - Mar 7
City	Napa
Date	2027-03-07 at 07:30
Field Size	~1,949 runners
Time Limit	6 hours
Cutoff pace	8:32/km
Course speed	Typical pace Speed index 1.03 — median of the last 4 winners' times against the global same-year median. Winner times track elite fields and prize money, so this reads the course as a proxy, not a pure measurement.
Timezone	America/Los_Angeles
Official Site	Napa Valley Marathon

Race Day Weather

Average Temperature	9.5°C / 49°F
Humidity	82%
Wind	14.9 km/h
Rain Chance	36%
Typical Conditions	Cool, often damp early-March Napa Valley morning — temperatures around 46 degrees F (8 degrees C) at the 7:30 a.m. start in Calistoga, with morning fog or mist common before the sun burns through

What to Prepare: Early March in the valley usually means a chilly, sometimes foggy start in the upper 40s degrees F (around 8 degrees C) that warms into the 50s and 60s by late morning. This is the wettest stretch of the running calendar here, so a rain layer is a real possibility — pack throwaway gloves and a long-sleeve you can shed, and watch the forecast for a passing front off the Pacific. The start is rural and exposed, so dress for standing around before the gun.

Based on historical averages for race week. Use our Weather Score Calculator and What to Wear Guide for personalized advice.

Wind Impact on Race Day

Wind at 14.9 km/h can affect your marathon pace by 5-15 seconds per kilometer. Headwinds slow you down exponentially — a 20 km/h wind costs more than twice a 10 km/h wind.

Calculate your wind-adjusted pace →

Race-Week Climate

Based on 20 years of race-week weather (2005-2024), MERRA-2 reanalysis

	Cooler	Typical	Warmer
Temperature	6°C	9.3°C	13.2°C
Dew point	2.4°C	5.6°C	10°C

Wet-day chance: 36% Runnability: 74/100

Recent actuals: 2023 7.5°C / 2024 8.1°C / 2025 10.8°C (morning avg)

Data: NASA POWER (MERRA-2 reanalysis), NASA Langley Research Center

Course Profile

Course Type	Point-to-point (net downhill)
Elevation Gain	171m
Terrain	Road (paved rural two-lane along the Silverado Trail, gentle net downhill with rolling rises)
Profile	A fast, scenic point-to-point that runs almost the entire way down the legendary Silverado Trail, from Calistoga at the head of the valley to a finish at Vintage High School in Napa. The headline number is a net elevation drop of about 303 ft (92 m) — gentle and runnable rather than a steep plunge — which makes this one of California's better Boston-qualifier courses. It is not pancake-flat, though: there is roughly 564 ft (171 m) of climbing against 867 ft (264 m) of descent, so the gradual downhill is laced with rolling rises through wine country, and the famously low turn count (about four turns in 26.2 miles) means you spend the day looking straight down a quiet two-lane road past vineyards and hillsides rather than fighting corners. The course is USATF-certified (certification CA20002DT) and a genuine Boston qualifier. The catch is logistics over terrain: it is a smaller, destination race that sells out, the start is a point-to-point bus ride from the finish, and there is a firm cutoff — a mandatory shuttle sweeps the course at mile 22.7 by 12:45 p.m., so run the downhills with control and bank time early.
Boston Qualifier	Yes — Check your BQ time

Prepare for 2027 Napa Valley Marathon - Mar 7

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Free Pace Band Generator — Printable Race Day Wristband

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Marathon Wake-Up Time Calculator — Race Morning Timeline

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What to Wear Running by Temperature — Clothing Guide

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Dew Point Running Calculator — Pace Adjustment Chart

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Elevation Gain/Loss Impact Calculator

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Frequently Asked Questions

When is the 2027 Napa Valley Marathon and what time does it start?

The 2027 Napa Valley Marathon is held on Sunday, March 7, 2027. The full marathon starts at 7:30 a.m. Pacific Time at the Silverado Trail and Brannan Street in Calistoga, with the half marathon (a separate distance) starting earlier at 7:00 a.m. from Conn Creek. Because the race is point-to-point, runners ride shuttle buses from the Napa finish area up to the Calistoga start, so plan to be at the bus pickup well before dawn.

Is the Napa Valley Marathon a good Boston qualifier course?

Yes — it is one of California's more popular Boston-qualifying marathons. The course is USATF-certified (CA20002DT) and runs net downhill, dropping about 303 ft (92 m) over the 26.2 miles, which gives a gentle assist without being a steep, leg-trashing plunge. It is not dead flat (there is some rolling climbing), so it rewards even pacing rather than a reckless early charge. Check your age-group target on the Boston qualifying calculator and model a goal split with the race time predictor.

Is the Napa Valley Marathon course flat or downhill?

It is best described as a gentle net downhill, not flat. The route loses about 867 ft (264 m) and climbs about 564 ft (171 m) for a net drop near 303 ft (92 m), so the overall trend is downhill but it rolls along the way. The famously low turn count — only about four turns in the whole race — and the long straight run down the Silverado Trail make it feel fast and rhythmic. Use the downhill to hold goal pace comfortably rather than to over-stride; the pace calculator helps you plan splits for a net-downhill course.

What is the time limit for the Napa Valley Marathon?

The full marathon has a 6-hour course time limit, which works out to roughly a 13:44 per mile (8:32 per km) pace. There is a firm intermediate cutoff: a mandatory sweep shuttle picks up runners at mile 22.7 at 12:45 p.m. sharp, so you need to be on pace through the back half. Slower runners should bank a little time on the gentle early downhills rather than relying on a late surge.

How do I register and how much does it cost?

Registration is handled online through the official Napa Valley Marathon site, with the 2027 entry window opening on June 24. There is no lottery — entry is first-come, first-served, and each distance reliably sells out, so register early. The standard full-marathon entry has run around $205 in recent years, with prices stepping up as the field fills. Note the marathon and half marathon are separate distances on the same morning.

How big is the Napa Valley Marathon and is it just a marathon?

It is a smaller destination race rather than a big-city event: the full marathon drew about 1,949 finishers in 2026. It is no longer marathon-only — the weekend now also includes a half marathon (which starts at Conn Creek and is actually the larger field) plus a 5K, though each distance is timed and ranked separately. The intimate scale, rural Silverado Trail setting and wine-country backdrop are a big part of the appeal, but it also means a smaller crowd and a logistics-heavy point-to-point format.