The 2026 San Lorenzo River Trail Run has concluded.

San Lorenzo River Trail Run

Race complete
Santa Cruz, CA, USA · July 11, 2026
clear-day56°·74° high·Breezy·Dry
8
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Race Day Weather

clear-day
56°at start
74° high
Breezy
Dry

Cool start, warming trend

Runners will face a temperature rise from 54°F at the start to a peak of 74°F. With average humidity at 68% and a light wind from the W, pacing adjustments may be necessary as the race progresses. It's advisable to hydrate frequently and consider starting conservatively to manage the heat later on.

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Race Info

The San Lorenzo River Trail Run is an annual trail race in Santa Cruz, California, organized by Coastal Trail Runs. Held each July, it starts and finishes at Harvey West Park and offers 10K, Half Marathon, 30K, Marathon, and 50K distances, with the marathon run as two half-marathon loops. The course crosses the San Lorenzo River multiple times and passes through coastal redwood forest, stream canyons, and chaparral ridges toward Henry Cowell Redwoods State Park. Source

Area Map

Course Map

FAQ

When is the 2026 San Lorenzo River Trail Run?

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

Is the San Lorenzo River Trail Run a Boston Marathon Qualifier?

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

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

The forecast calls for a high of 74°F and a low of 53°F with a 0% chance of rain.

Historical Weather

Based on 16 years of data
Avg Temp
70°F
L:56° H:71°
RunScore
8
Conditions
Rain Freq
6%
1 of 16 yrs
Wind10mph
Dew53°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScore
2025
partly-cloudy-day
54°/69°-
8
2024
cloudy
57°/70°-
8
2023
cloudy
55°/74°-
8
2022
clear-day
56°/71°-
8
2021
partly-cloudy-day
57°/71°-
8
2020
partly-cloudy-day
56°/68°-
8
2019
partly-cloudy-day
55°/73°-
8
2018
partly-cloudy-day
60°/71°-
8
2017
cloudy
58°/70°-
8
2016
partly-cloudy-day
55°/77°-
8
2015
partly-cloudy-day
57°/70°-
8
2014
cloudy
57°/69°-
8
2013
partly-cloudy-day
54°/73°-
8
2012
partly-cloudy-day
56°/67°Light
9
2011
partly-cloudy-day
55°/70°-
8
2010
clear-day
61°/75°-
8