Humboldt Redwoods Marathon

Runners will face temperatures starting at 49°F and climbing to 67°F by the finish, with a light breeze from the WSW at 11 mph. Humidity will be moderate at 55%, making hydration essential, especially in the later laps. As temperatures rise, runners should consider adjusting their pace to conserve energy and stay comfortable. The rolling course will present a mix of wind, but it's manageable throughout.

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Distance: 26.2mi

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The Humboldt Redwoods Marathon runs through old-growth redwood forest in Humboldt Redwoods State Park, along the Avenue of the Giants near Weott, California. The course is USATF-certified and a Boston Marathon qualifier. The marathon and half marathon both start and finish near the Dyerville Bridge and run as out-and-back routes on paved roads, with some rolling grades. GPS watches can lose signal under the tree canopy. Source

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Race weekend

Sunday, October 11

8:30 AMMarathon (26.2 mi)

8:30 AMHalf Marathon (13.1 mi)

9:00 AM5K (3.1 mi)

FAQ

When is the 2026 Humboldt Redwoods Marathon?

The 2026 Humboldt Redwoods Marathon will be held on Sunday October 11, 2026.

Is the Humboldt Redwoods Marathon a Boston Marathon Qualifier?

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

What will the weather be like for the 2026 Humboldt Redwoods Marathon?

The forecast calls for a high of 65°F and a low of 47°F with a 6% chance of rain.

Historical Weather

Based on 30 years of data

Avg Temp

55°F

L:50° H:59°

RunScore

Conditions

Rain Freq

20%

6 of 30 yrs

Wind6mph

Dew49°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Humboldt Redwoods Marathon Partly cloudy throughout the day. 2025	48°/57°	-	50°
2024 Humboldt Redwoods Marathon Clearing in the afternoon. 2024	56°/63°	-	59°
2023 Humboldt Redwoods Marathon Partly cloudy throughout the day. 2023	48°/56°	-	51°
2022 Humboldt Redwoods Marathon Partly cloudy throughout the day. 2022	49°/56°	-	52°
2021 Humboldt Redwoods Marathon Partly cloudy throughout the day. 2021	43°/56°	-	47°
2019 Humboldt Redwoods Marathon Partly cloudy throughout the day with rain clearing later. 2019	41°/59°	Light	43°
2018 Humboldt Redwoods Marathon Partly cloudy throughout the day. 2018	44°/56°	-	45°
2017 Humboldt Redwoods Marathon Clear conditions throughout the day. 2017	49°/71°	-	37°
2016 Humboldt Redwoods Marathon Cloudy skies throughout the day with a chance of rain throughout the day. 2016	56°/58°	Light	54°
2015 Humboldt Redwoods Marathon Partly cloudy throughout the day. 2015	54°/64°	-	55°
2014 Humboldt Redwoods Marathon Partly cloudy throughout the day. 2014	60°/68°	-	57°
2013 Humboldt Redwoods Marathon Partly cloudy throughout the day. 2013	42°/49°	Light	45°
2012 Humboldt Redwoods Marathon Becoming cloudy in the afternoon with late afternoon rain. 2012	39°/57°	-	40°
2011 Humboldt Redwoods Marathon Cloudy skies throughout the day. 2011	57°/59°	-	55°
2010 Humboldt Redwoods Marathon Cloudy skies throughout the day. 2010	50°/52°	-	47°
2009 Humboldt Redwoods Marathon Cloudy skies throughout the day with early morning rain. 2009	51°/56°	-	53°
2008 Humboldt Redwoods Marathon Cloudy skies throughout the day with morning rain. 2008	50°/52°	Light	51°
2007 Humboldt Redwoods Marathon Clear conditions throughout the day with early morning rain. 2007	38°/56°	-	41°
2006 Humboldt Redwoods Marathon Cloudy skies throughout the day with rain. 2006	52°/60°	-	47°
2005 Humboldt Redwoods Marathon Clear conditions throughout the day. 2005	50°/66°	-	49°
2004 Humboldt Redwoods Marathon Cloudy skies throughout the day with rain. 2004	54°/59°	Light	54°
2003 Humboldt Redwoods Marathon Partly cloudy throughout the day with rain clearing later. 2003	59°/70°	Light	55°
2002 Humboldt Redwoods Marathon Partly cloudy throughout the day. 2002	52°/64°	-	52°
2001 Humboldt Redwoods Marathon Partly cloudy throughout the day with afternoon rain. 2001	48°/51°	-	48°
2000 Humboldt Redwoods Marathon Partly cloudy throughout the day. 2000	49°/60°	-	51°
1999 Humboldt Redwoods Marathon Clear conditions throughout the day. 1999	59°/72°	-	39°
1998 Humboldt Redwoods Marathon Partly cloudy throughout the day. 1998	52°/58°	-	50°
1997 Humboldt Redwoods Marathon Clearing in the afternoon. 1997	54°/61°	-	50°
1996 Humboldt Redwoods Marathon Partly cloudy throughout the day. 1996	48°/54°	-	45°
1995 Humboldt Redwoods Marathon Partly cloudy throughout the day. 1995	53°/59°	-	53°