Humboldt Bay Marathon

Eureka, CA, USA · August 8, 2027·

54°·67° high·Light·Dry

Weather

Humboldt Bay Marathon race day weather

54°at start

67° high

Light

Dry

Your Goal

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Warming temps, light wind

Runners will face a temperature increase from 54°F at the start to 67°F by the finish. With a max wind of 8 mph from the NNW, wind will be light and not a major factor. Average humidity is at 71%, which may feel sticky, so pacing adjustments are recommended to manage heat as temperatures rise.

Race day forecast available in 252 days

5 AM

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7 AM

Start

8 AM

9 AM

10 AM

11 AM

Finish

12 PM

1 PM

Cutoff

2 PM

3 PM

Pace Calculator

Distance: 26.2mi

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About the Humboldt Bay Marathon

The Humboldt Bay Marathon offers runners a scenic, flat course along Eureka's Waterfront Trails and the Humboldt Bay Trail, with a loop around Klopp Lake in the Arcata Marsh. Starting and finishing at Madaket Plaza in Eureka, the race provides ample aid stations and restroom facilities, ensuring a comfortable experience for participants. The event fosters a vibrant community atmosphere, attracting runners of all levels to enjoy the picturesque coastal views and supportive environment.

Website

Race weekend

Sunday, August 8

7:00 AMMarathon (26.2 mi)

8:00 AMHalf Marathon (13.1 mi)

8:20 AM5K (3.1 mi)

Course Map

Humboldt Bay Marathon FAQ

When is the 2027 Humboldt Bay Marathon?

The 2027 Humboldt Bay Marathon will be held on Sunday August 8, 2027.

Is the Humboldt Bay Marathon a Boston Marathon Qualifier?

Yes, the Humboldt Bay Marathon is an official Boston Marathon qualifier.

What is the time limit for the Humboldt Bay Marathon?

The time limit for the Humboldt Bay Marathon is 6 hours.

What will the weather be like for the 2027 Humboldt Bay Marathon?

The forecast calls for a high of 74°F and a low of 54°F with a 0% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

What is the weather usually like for the Humboldt Bay Marathon?

Over the 11 years racecast.io has race-day weather for (2015 to 2026), it averaged 55°F at the start and 59°F by a typical finish. Rain fell during race hours in 1 of those years (2016).

What was the hottest Humboldt Bay Marathon?

Of the 11 years on record, 2015 was the warmest, reaching 63°F during race hours. The coldest start was 2016, at 51°F.

What was the windiest Humboldt Bay Marathon?

Of the 11 years on record, 2022 was the windiest, with wind averaging 5 mph during race hours. The calmest was 2016, at 2 mph.

Humboldt Bay Marathon weather history

Based on 11 years of data

Avg Temp

57°F

L:55° H:59°

RunScore

Conditions

Rain Freq

1 of 11 yrs

Wind4mph

Dew55°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 Humboldt Bay Marathon Partly cloudy throughout the day. 2026	55°/58°	-	54°
2025 Humboldt Bay Marathon Clearing in the afternoon. 2025	52°/56°	-	53°
2024 Humboldt Bay Marathon Cloudy skies throughout the day. 2024	55°/56°	-	55°
2023 Humboldt Bay Marathon Partly cloudy throughout the day. 2023	55°/61°	-	56°
2022 Humboldt Bay Marathon Partly cloudy throughout the day. 2022	58°/61°	-	56°
2021 Humboldt Bay Marathon Partly cloudy throughout the day. 2021	56°/59°	-	56°
2019 Humboldt Bay Marathon Clear conditions throughout the day. 2019	53°/63°	-	55°
2018 Humboldt Bay Marathon Partly cloudy throughout the day. 2018	57°/58°	-	56°
2017 Humboldt Bay Marathon Partly cloudy throughout the day. 2017	54°/62°	-	55°
2016 Humboldt Bay Marathon Cloudy skies throughout the day with morning rain. 2016	51°/54°	Light	52°
2015 Humboldt Bay Marathon Partly cloudy throughout the day. 2015	56°/63°	-	56°