San Lorenzo River Marathon

Santa Cruz, CA, USA · July 11, 2026
partly-cloudy-day61°·69° high·Breezy·Dry
9
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Weather
Course
Race Info
FAQ
History

Race Day Weather

partly-cloudy-day
61°at start
69° high
Breezy
Dry

Comfortable temps, steady breeze

Runners will face a temperature increase from 58°F to 69°F during the race, with an average humidity of 72%. Winds will come from the W at 8 mph, providing a light breeze throughout. It is advisable for runners to stay hydrated and pace conservatively as humidity may impact performance.

Race day forecast available in 6 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

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Area Map

Course Map

Course Map Unavailable

We don't have course map data for San Lorenzo River Marathon yet. If you have a GPX file (or other format) for this race, we'd love to add it!

FAQ

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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 69°F and a low of 56°F with a 0% chance of rain.

Historical Weather

Based on 15 years of data
Avg Temp
70°F
L:57° H:71°
RunScore
8
Conditions
Rain Freq
7%
1 of 15 yrs
Wind10mph
Dew53°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScore

2024 San Lorenzo River Marathon

Partly cloudy throughout the day.

2024
cloudy
57°/70°-
8

2023 San Lorenzo River Marathon

Clearing in the afternoon.

2023
cloudy
55°/74°-
8

2022 San Lorenzo River Marathon

Clearing in the afternoon.

2022
clear-day
56°/71°-
8

2021 San Lorenzo River Marathon

Clearing in the afternoon.

2021
partly-cloudy-day
57°/71°-
8

2020 San Lorenzo River Marathon

Partly cloudy throughout the day.

2020
partly-cloudy-day
56°/68°-
8

2019 San Lorenzo River Marathon

Clearing in the afternoon.

2019
partly-cloudy-day
55°/73°-
8

2018 San Lorenzo River Marathon

Partly cloudy throughout the day.

2018
partly-cloudy-day
60°/71°-
8

2017 San Lorenzo River Marathon

Partly cloudy throughout the day.

2017
cloudy
58°/70°-
8

2016 San Lorenzo River Marathon

Clear conditions throughout the day.

2016
partly-cloudy-day
55°/77°-
8

2015 San Lorenzo River Marathon

Partly cloudy throughout the day.

2015
partly-cloudy-day
57°/70°-
8

2014 San Lorenzo River Marathon

Clearing in the afternoon.

2014
cloudy
57°/69°-
8

2013 San Lorenzo River Marathon

Clear conditions throughout the day.

2013
partly-cloudy-day
54°/73°-
8

2012 San Lorenzo River Marathon

Clearing in the afternoon with rain.

2012
partly-cloudy-day
56°/67°Light
9

2011 San Lorenzo River Marathon

Clearing in the afternoon.

2011
partly-cloudy-day
55°/70°-
8

2010 San Lorenzo River Marathon

Clear conditions throughout the day.

2010
clear-day
61°/75°-
8

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Free guidesMarathon Fueling Guide·Carb Loading Guide·Race Morning Guide·Race Day Gear Guide·Pacing Strategy Guide·Mental Strategy Guide

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