Humboldt Bay Marathon

Eureka, CA, USA · August 9, 2026

54°·71° high·Light·Dry

Weather

Pace Calc

Race Day Weather

54°at start

73° high

Breezy

Dry

Cool start, warming trend ahead

Runners will face a temperature rise from 53°F at the start to a peak of 73°F. With a max wind of 8 mph from the SW and gusts up to 25 mph, adjustments may be needed in pacing. Given the average humidity of 70%, a conservative start is advisable to manage heat accumulation.

Race day forecast available in 68 days

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Distance: 26.2mi

Target Finish Time

0:00:00

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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.

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Course Map

FAQ

When is the 2026 Humboldt Bay Marathon?

The 2026 Humboldt Bay Marathon will be held on Sunday August 9, 2026.

Is the Humboldt Bay Marathon a Boston Marathon Qualifier?

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

What will the weather be like for the 2026 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 9 years of data

Avg Temp

64°F

L:55° H:64°

RunScore

Conditions

Rain Freq

11%

1 of 9 yrs

Wind11mph

Dew56°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Humboldt Bay Marathon Clearing in the afternoon. 2025	52°/65°	-	54°
2024 Humboldt Bay Marathon Cloudy skies throughout the day. 2024	55°/61°	-	55°
2023 Humboldt Bay Marathon Partly cloudy throughout the day. 2023	55°/65°	-	57°
2022 Humboldt Bay Marathon Partly cloudy throughout the day. 2022	58°/63°	-	56°
2019 Humboldt Bay Marathon Clear conditions throughout the day. 2019	53°/68°	-	55°
2018 Humboldt Bay Marathon Partly cloudy throughout the day. 2018	57°/63°	-	56°
2017 Humboldt Bay Marathon Partly cloudy throughout the day. 2017	54°/68°	-	57°
2016 Humboldt Bay Marathon Cloudy skies throughout the day with morning rain. 2016	51°/60°	Light	53°
2015 Humboldt Bay Marathon Partly cloudy throughout the day. 2015	56°/66°	-	57°