San Lorenzo River Marathon
Santa Cruz, CA, USA • July 11, 2026
Race Day Weather
56°
72° high
Breezy
Dry
Cool morning, warming trend ahead
Runners will face a temperature increase from 57°F at the start to a peak of 72°F. Winds will be light at 10 mph from the SW with gusts up to 23 mph. With humidity at 67%, it’s advisable to start conservatively and maintain hydration throughout the race.
Race day forecast available in 98 days
Pre-raceRace windowPost-race
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
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
7%
1 of 15 yrs
Wind10mph
Dew53°F
Temperature History
Range of temperatures during race hours for each year.
Detailed History
| Year | Conditions | Low / High | Rain | Dew Point | Score |
|---|---|---|---|---|---|
2024 |  | 57°/70° | - | 55° | |
2023 | | 55°/74° | - | 56° | |
2022 | | 56°/71° | - | 47° | |
2021 | | 57°/71° | - | 55° | |
2020 | | 56°/68° | - | 54° | |
2019 | | 55°/73° | - | 54° | |
2018 | | 60°/71° | - | 56° | |
2017 | | 58°/70° | - | 58° | |
2016 | | 55°/77° | - | 53° | |
2015 | | 57°/70° | - | 56° | |
2014 | | 57°/69° | - | 50° | |
2013 | | 54°/73° | - | 50° | |
2012 | | 56°/67° | Light | 47° | |
2011 | | 55°/70° | - | 54° | |
2010 | | 61°/75° | - | 54° |
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