Race Discovery
San Lorenzo River Trail Run
San Lorenzo River Trail Run logo

San Lorenzo River Trail Run

Santa Cruz, California, United States View on map
Jul 10, 2027 (America/Los_Angeles local time)
Trail running

About this 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 above) multiple times!  (Distances are accurately measured using a Rolatape® surveyor's measuring wheel.)

Pick your distance

Trail running

10K

Jul 10, 2027 10.1K 8:15 AM
$60.00
Open

Half Marathon

Jul 10, 2027 Half-Marathon 8:00 AM
$70.00
Open

30K

Jul 10, 2027 30K 8:00 AM
$75.00
Open

Marathon

Jul 10, 2027 Marathon 8:00 AM
$80.00
Open

50K

Jul 10, 2027 Ultra 8:00 AM
$90.00
Open

Running

Kid's Run (6yo & younger, 1/4 mi) - Free!

Kids 6 yo & younger

Jul 10, 2027 0.4K 7:50 AM
Free
Open

Coastal Testing

Jul 10, 2027 3.2K 8:45 AM
Free
Open

Typical race-day weather

Based on 10 years of Open-Meteo archive data for this event's race dates in Santa Cruz, plus the 3 days either side.

Temp (°C)
Minimum temperature (race-week average) 13.3° / Maximum temperature (race-week average) 24.4°
Feels Like (°C)
Minimum feels like — heat index / wind chill (race-week average) 13.2° / Maximum feels like — heat index / wind chill (race-week average) 25.5°
Peak wind (km/h)
Strongest wind of the day (race-week average)
12.4
Precip (mm)
Precipitation over the day (race-week average)
0.0mm
Humidity
Mean relative humidity (race-week average)
74.0%
Sunrise
Sunrise at the start line on July 10, 2027 (PDT)
Sunset
Sunset at the start line on July 10, 2027 (PDT)
Daylight
Hours between sunrise and sunset on race day
14h 32m

The sun rises at 5:57 AM and sets at 8:29 PM local time (PDT) in Santa Cruz on July 10, 2027 — 14h 32m of daylight.

Course

No course map published yet.

The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.

Reviews

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Results — San Lorenzo River Trail Run

2026 edition View Results
2025 edition View Results
2024 edition View Results
2023 edition View Results
2022 edition View Results

Other races near Santa Cruz

Different organizers, within 40 miles, in the next three months

Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.

  • Entries, prices, waves and inclusions — the event's official registration page
  • Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
  • Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
  • Comparisons and counts — Race Discovery calendar, 14 Santa Cruz events

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