The 2025 event has concluded.

Humboldt Bay Marathon

Eureka, CA, USA • August 10, 2025
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partly-cloudy-day Clearing in the afternoon.

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When is the 2025 Humboldt Bay Marathon?

The 2025 Humboldt Bay Marathon will be held on Sunday August 10, 2025.

Is the Humboldt Bay Marathon a Boston Marathon Qualfier?

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

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Historical Weather & Results

RunScore
Run Score: 8
Temp
64°F
Min/Max
55°/64°F
Dew
57°F
Days of Rain
1/8
Wind
11mph
Tap a row for details.
YearLow / HighRain

Humboldt Bay Marathon 2024 Weather History

Cloudy skies throughout the day.

2024
cloudy
55°/ 61°-
Run Score: 9

Humboldt Bay Marathon 2023 Weather History

Partly cloudy throughout the day.

2023
cloudy
55°/ 65°-
Run Score: 8

Humboldt Bay Marathon 2022 Weather History

Partly cloudy throughout the day.

2022
cloudy
58°/ 63°-
Run Score: 9

Humboldt Bay Marathon 2019 Weather History

Clear conditions throughout the day.

2019
partly-cloudy-day
53°/ 68°-
Run Score: 8

Humboldt Bay Marathon 2018 Weather History

Partly cloudy throughout the day.

2018
cloudy
57°/ 63°-
Run Score: 9

Humboldt Bay Marathon 2017 Weather History

Partly cloudy throughout the day.

2017
clear-day
54°/ 68°-
Run Score: 8

Humboldt Bay Marathon 2016 Weather History

Cloudy skies throughout the day with morning rain.

2016
fog
51°/ 60°Light
Run Score: 8

Humboldt Bay Marathon 2015 Weather History

Partly cloudy throughout the day.

2015
partly-cloudy-day
56°/ 66°-
Run Score: 8
You Need an Account For That

Setting up a racecast.io account will allow you to start building a reputation in the community. Over time you'll be able to rate races, join the discussion, and post in the community.

Right now we are invite only, you can get on the waitlist by entering your email below:

OR
You Need an Account For That

Setting up a racecast.io account will allow you to start building a reputation in the community. Over time you'll be able to rate races, join the discussion, and post in the community.

Right now we are invite only, you can get on the waitlist by entering your email below:

OR