Humboldt Redwoods Marathon

Runners will face a temperature climb from 56°F at the start to 68°F by the finish, with light winds at 6 mph. Humidity is moderate at 55%, and while there is a light chance of rain, it should not significantly impact conditions. As temperatures rise, runners should consider adjusting their pace in later laps to stay comfortable and hydrated.

Race day forecast available in 337 days

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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 10

8:30 AMMarathon (26.2 mi)

8:30 AMHalf Marathon (13.1 mi)

9:00 AM5K (3.1 mi)

FAQ

When is the 2027 Humboldt Redwoods Marathon?

The 2027 Humboldt Redwoods Marathon will be held on Sunday October 10, 2027.

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 2027 Humboldt Redwoods Marathon?

The forecast calls for a high of 75°F and a low of 53°F with a 5% chance of rain.

Historical Weather

Based on 31 years of data

Avg Temp

54°F

L:50° H:59°

RunScore

Conditions

Rain Freq

19%

6 of 31 yrs

Wind6mph

Dew49°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 Humboldt Redwoods Marathon Clear conditions throughout the day. 2026	43°/59°	-	43°
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°