Humboldt Bay Marathon

Eureka, CA, USA · August 8, 2027·

54°·67° high·Light·Dry

Weather

Race Day Weather

54°at start

72° high

Breezy

Dry

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Warming up, mild conditions ahead

Runners will face a temperature rise from 54°F at the start to 67°F by late morning, with humidity averaging 71%. Wind will be light from the NNW, but gusts may create brief challenges. Runners should consider adjusting their pace as the race progresses to accommodate the warming conditions.

Race day forecast available in 273 days

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Distance: 26.2mi

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Race Info

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

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.

Historical Weather

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°