San Lorenzo River Marathon

Santa Cruz, CA, USA · July 11, 2026

59°·73° high·Light·Dry

Weather

Race Day Weather

59°at start

74° high

Light

Dry

Warm afternoon, steady pace advised

Runners will face temperatures rising from 57°F at the start to 72°F by the finish, with average humidity at 75%. Winds will be light from the W, making for a negligible impact on pace. Given the warm conditions, runners should start conservatively and hydrate frequently to maintain performance.

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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 74°F and a low of 57°F with a 1% 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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