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Race Overview
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.
WikipediaNews
July 12, 2023
Upcoming marathons and other races happening this weekend.
FAQ
When is the 2027 San Lorenzo River Trail Run?
The 2027 San Lorenzo River Trail Run will be held on Saturday July 10, 2027.
Is the San Lorenzo River Trail Run a Boston Marathon Qualfier?
No, the San Lorenzo River Trail Run is NOT a Boston Marathon qualifier.
San Lorenzo River Trail Run Weather History
San Lorenzo River Trail Run Weather Averages
Average Temp: 61°, Average Low: 54°, Average High: 71°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 56° | 59° | 63° | 66° | 68° | 70° | 71° | 70° |
| Feel | 56° | 59° | 63° | 66° | 68° | 70° | 71° | 70° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 3mph | 3mph | 4mph | 6mph | 8mph | 9mph | 10mph | 10mph |
| Dew | 53° | 53° | 53° | 53° | 53° | 53° | 53° | 54° |
| RunScore |  | |  | | | | | |
San Lorenzo River Trail Run 2026
Jul 11, 2026
Clearing in the afternoon.
Low: 53°, High: 74°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 56° | 57° |  63° | 67° | 70° | 71° | 74° | 71° |
| Feel | 56° | 57° | 63° | 67° | 70° | 71° | 74° | 71° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 4mph | 1mph | 2mph | 6mph | 8mph | 9mph | 8mph | 11mph |
| Dew | 52° | 52° | 53° | 54° | 54° | 54° | 55° | 54° |
| RunScore | | | | | | | |  |
San Lorenzo River Trail Run 2025
Jul 12, 2025
Clearing in the afternoon.
Low: 54°, High: 69°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 54° | 56° | 60° | 64° | 67° | 69° | 69° | 68° |
| Feel | 54° | 56° | 60° | 64° | 67° | 69° | 69° | 68° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 5mph | 2mph | 3mph | 6mph | 9mph | 9mph | 10mph | 11mph |
| Dew | 53° | 53° | 53° | 53° | 53° | 53° | 54° | 54° |
| RunScore | | | | | | | | |
San Lorenzo River Trail Run 2024
Jul 13, 2024
Partly cloudy throughout the day.
Low: 55°, High: 70°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp |  57° | 59° | 62° | 65° | 67° | 65° | 70° | 67° |
| Feel | 57° | 59° | 62° | 65° | 67° | 65° | 70° | 67° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 3mph | 4mph | 6mph | 10mph | 7mph | 10mph | 11mph | 9mph |
| Dew | 54° | 53° | 54° | 55° | 56° | 55° | 57° | 55° |
| RunScore | | | | | | | | |
San Lorenzo River Trail Run 2023
Jul 15, 2023
Clearing in the afternoon.
Low: 55°, High: 74°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 55° | 59° | 65° | 68° | 69° | 73° | 74° | 73° |
| Feel | 55° | 59° | 65° | 68° | 69° | 73° | 74° | 73° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 0mph | 0mph | 4mph | 6mph | 8mph | 7mph | 8mph | 8mph |
| Dew | 54° | 55° | 56° | 56° | 56° | 57° | 57° | 57° |
| RunScore | | | | | | | | |
San Lorenzo River Trail Run 2022
Jun 18, 2022
Clearing in the afternoon.
Low: 50°, High: 71°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 56° | 59° | 62° | 64° | 66° | 70° | 71° | 71° |
| Feel | 56° | 59° | 62° | 64° | 66° | 70° | 71° | 71° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 1mph | 7mph | 7mph | 12mph | 10mph | 10mph | 15mph | 18mph |
| Dew | 48° | 49° | 49° | 48° | 47° | 44° | 44° | 46° |
| RunScore | | | | | | | |  |
San Lorenzo River Trail Run 2021
Jun 19, 2021
Clearing in the afternoon.
Low: 55°, High: 71°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 57° | 59° | 62° | 66° | 70° | 70° | 71° | 71° |
| Feel | 57° | 59° | 62° | 66° | 70° | 70° | 71° | 71° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 0mph | 4mph | 5mph | 4mph | 9mph | 8mph | 11mph | 10mph |
| Dew | 53° | 54° | 53° | 55° | 55° | 55° | 56° | 55° |
| RunScore | | | | | | | | |
San Lorenzo River Trail Run 2020
Jun 20, 2020
Partly cloudy throughout the day.
Low: 55°, High: 68°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 56° | 57° | 58° | 61° | 64° | 66° | 67° | 68° |
| Feel | 56° | 57° | 58° | 61° | 64° | 66° | 67° | 68° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 4mph | 4mph | 3mph | 1mph | 6mph | 8mph | 10mph | 9mph |
| Dew | 53° | 53° | 53° | 54° | 53° | 54° | 55° | 55° |
| RunScore | | | | | | | | |
San Lorenzo River Trail Run 2019
Jun 22, 2019
Clearing in the afternoon.
Low: 53°, High: 73°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 55° | 58° | 63° | 68° | 73° | 72° | 71° | 72° |
| Feel | 55° | 58° | 63° | 68° | 73° | 72° | 71° | 72° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 0mph | 0mph | 1mph | 1mph | 7mph | 13mph | 9mph | 10mph |
| Dew | 52° | 52° | 53° | 54° | 56° | 54° | 54° | 53° |
| RunScore | | | | | | | | |
San Lorenzo River Trail Run 2018
Jun 24, 2018
Partly cloudy throughout the day.
Low: 58°, High: 71°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 60° | 63° | 64° | 68° | 68° | 69° | 69° | 71° |
| Feel | 60° | 63° | 64° | 68° | 68° | 69° | 69° | 71° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 6mph | 6mph | 7mph | 12mph | 10mph | 10mph | 8mph | 8mph |
| Dew | 55° | 55° | 56° | 56° | 56° | 57° | 57° | 58° |
| RunScore | | | | | | | | |
San Lorenzo River Trail Run 2017
Jun 24, 2017
Partly cloudy throughout the day.
Low: 58°, High: 70°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 58° | 60° | 63° | 66° | 68° | 70° | 69° | 69° |
| Feel | 58° | 60° | 63° | 66° | 68° | 70° | 69° | 69° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 0mph | 1mph | 5mph | 4mph | 5mph | 8mph | 6mph | 10mph |
| Dew | 57° | 58° | 58° | 58° | 58° | 58° | 59° | 59° |
| RunScore | | | | | | | | |
San Lorenzo River Trail Run 2016
Jun 26, 2016
Clear conditions throughout the day.
Low: 51°, High: 77°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 55° | 61° | 65° | 68° | 72° | 76° | 77° | 75° |
| Feel | 55° | 61° | 65° | 68° | 72° | 76° | 77° | 75° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 1mph | 5mph | 6mph | 6mph | 8mph | 8mph | 10mph | 9mph |
| Dew | 53° | 54° | 55° | 55° | 53° | 52° | 51° | 51° |
| RunScore | | | | | | | | |
San Lorenzo River Trail Run 2015
Jun 13, 2015
Partly cloudy throughout the day.
Low: 56°, High: 70°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 57° | 59° | 61° | 65° | 68° | 68° | 70° | 68° |
| Feel | 57° | 59° | 61° | 65° | 68° | 68° | 70° | 68° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 2mph | 4mph | 4mph | 5mph | 8mph | 7mph | 10mph | 11mph |
| Dew | 56° | 55° | 55° | 55° | 55° | 57° | 57° | 57° |
| RunScore | | | | | | | | |
San Lorenzo River Trail Run 2014
Jun 21, 2014
Clearing in the afternoon.
Low: 52°, High: 69°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 57° | 58° | 62° | 66° | 69° | 69° | 69° | 68° |
| Feel | 57° | 58° | 62° | 66° | 69° | 69° | 69° | 68° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 5mph | 3mph | 1mph | 2mph | 7mph | 9mph | 7mph | 10mph |
| Dew | 52° | 51° | 51° | 51° | 50° | 51° | 48° | 49° |
| RunScore | | | | | | | | |
San Lorenzo River Trail Run 2013
Jun 22, 2013
Clear conditions throughout the day.
Low: 50°, High: 73°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 54° | 58° | 64° | 67° | 72° | 71° | 73° | 72° |
| Feel | 54° | 58° | 64° | 67° | 72° | 71° | 73° | 72° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 1mph | 0mph | 0mph | 4mph | 6mph | 9mph | 14mph | 11mph |
| Dew | 50° | 50° | 50° | 51° | 50° | 51° | 49° | 51° |
| RunScore | | | | | | | | |
San Lorenzo River Trail Run 2012
Jun 23, 2012
Clearing in the afternoon with rain.
Low: 55°, High: 67°, Light Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 56° | 58° | 61° | 61° |  64° | 65° | 67° | 66° |
| Feel | 56° | 58° | 61° | 61° | 64° | 65° | 67° | 66° |
| Rain | - | - | - | - | light | - | - | - |
| Wind | 6mph | 6mph | 7mph | 3mph | 8mph | 9mph | 11mph | 12mph |
| Dew | 51° | 48° | 48° | 47° | 47° | 46° | 44° | 46° |
| RunScore | | | | | | | | |
San Lorenzo River Trail Run 2011
Jun 13, 2011
Clearing in the afternoon.
Low: 54°, High: 71°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 55° | 57° | 62° | 65° | 66° | 67° | 69° | 70° |
| Feel | 55° | 57° | 62° | 65° | 66° | 67° | 69° | 70° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 1mph | 0mph | 2mph | 8mph | 7mph | 6mph | 9mph | 8mph |
| Dew | 51° | 51° | 52° | 55° | 54° | 55° | 56° | 57° |
| RunScore | | | | | | | | |
San Lorenzo River Trail Run 2010
Jun 13, 2010
Clear conditions throughout the day.
Low: 54°, High: 75°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 61° | 65° | 69° | 71° | 72° | 73° | 73° | 75° |
| Feel | 61° | 65° | 69° | 71° | 72° | 73° | 73° | 75° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 3mph | 5mph | 6mph | 7mph | 7mph | 8mph | 10mph | 8mph |
| Dew | 52° | 52° | 54° | 54° | 55° | 54° | 54° | 54° |
| RunScore | | | | | | | | |