San Lorenzo River Marathon
Santa Cruz, CA, USA • July 11, 2026
Race Day Weather
56°
72° high
Breezy
Dry
Warming day, steady winds
Runners will face a temperature rise from 57°F at the start to 72°F by the finish, accompanied by a steady wind from the SW at 10 mph. With humidity at 67% and a dew point of 55°F, pacing adjustments are advisable as temperatures increase. Staying hydrated and monitoring effort will be key to maintaining performance.
Race day forecast available in 108 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
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° |