San Lorenzo River Marathon

Santa Cruz, CA, USA · July 11, 2026

60°·72° high·Breezy·Dry

Weather

Race Day Weather

60°at start

72° high

Breezy

Dry

Cool start, warming up

Runners will face a temperature rise from 57°F to 72°F, with humidity averaging 67% throughout. A light wind from the SW at 10 mph will provide a slight tailwind effect. As temperatures increase, runners should consider adjusting their pace and hydrating frequently to maintain performance.

Race day forecast available in 53 days

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Race Info

Run through 300 foot tall, 1500 year-old Coastal Redwoods, lush stream canyons, open meadows, pine and oak forests, and high dry chaparral-covered ridges. The Half Marathon, 30K, Marathon, and 50K events cross the San Lorenzo River (shown below) multiple times! Source

Website

Course Map

FAQ

When is the 2026 San Lorenzo River Marathon?

The 2026 San Lorenzo River Marathon will be held on Saturday July 11, 2026.

Is the San Lorenzo River Marathon a Boston Marathon Qualifier?

No, the San Lorenzo River Marathon is NOT a Boston Marathon qualifier.

What will the weather be like for the 2026 San Lorenzo River Marathon?

The forecast calls for a high of 72°F and a low of 55°F with a 0% chance of rain.

Historical Weather

Based on 15 years of data

Avg Temp

70°F

L:57° H:71°

RunScore

Conditions

Rain Freq

1 of 15 yrs

Wind10mph

Dew53°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2024 San Lorenzo River Marathon Partly cloudy throughout the day. 2024	57°/70°	-	55°
2023 San Lorenzo River Marathon Clearing in the afternoon. 2023	55°/74°	-	56°
2022 San Lorenzo River Marathon Clearing in the afternoon. 2022	56°/71°	-	47°
2021 San Lorenzo River Marathon Clearing in the afternoon. 2021	57°/71°	-	55°
2020 San Lorenzo River Marathon Partly cloudy throughout the day. 2020	56°/68°	-	54°
2019 San Lorenzo River Marathon Clearing in the afternoon. 2019	55°/73°	-	54°
2018 San Lorenzo River Marathon Partly cloudy throughout the day. 2018	60°/71°	-	56°
2017 San Lorenzo River Marathon Partly cloudy throughout the day. 2017	58°/70°	-	58°
2016 San Lorenzo River Marathon Clear conditions throughout the day. 2016	55°/77°	-	53°
2015 San Lorenzo River Marathon Partly cloudy throughout the day. 2015	57°/70°	-	56°
2014 San Lorenzo River Marathon Clearing in the afternoon. 2014	57°/69°	-	50°
2013 San Lorenzo River Marathon Clear conditions throughout the day. 2013	54°/73°	-	50°
2012 San Lorenzo River Marathon Clearing in the afternoon with rain. 2012	56°/67°	Light	47°
2011 San Lorenzo River Marathon Clearing in the afternoon. 2011	55°/70°	-	54°
2010 San Lorenzo River Marathon Clear conditions throughout the day. 2010	61°/75°	-	54°

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