30KM
Run 30km
San Lorenzo River
- . 75 days left to book
- Santa Cruz
- 600 participants
- By Coastal Trail Runs
- Partly cloudy throughout the day
Why book with us?
- Official booking partner
- Best price guarantee
- Free injury protection
Have a question? See our Help Center
- We're #1 for customer satisfaction
Secure your place
Tickets $40–$70
- Official booking partner
- Best price guarantee
- Free injury protection
Have a question? See our Help Center
- We're #1 for customer satisfaction
Run along the San Lorenzo River in the shadow of ancient redwoods, abundant rivers and green meadows. This event has everything from a 10K to a 50K giving runners of all stripes a shot at their PB in this beautiful setting. Come for the view or the finisher's medal.
How to enter the San Lorenzo River
Half Marathon
Run 13.1mi10 km
Run 10kmUltra
Run 50kmMarathon
Run 26.2mi
San Lorenzo River routes
This beautiful race takes place along the San Lorenzo river, a stretch of land that has the best that California has to offer, from the 300 foot redwoods to the quaint streams and every fern in between.
Terrain: The tracks follow an even mixture of single track and dirt roads.
Elevation Gain: This event involves a fair amount of climbing so runners should make sure they have included some hill climbs in their training schedule and warmed up those quads before they hit the track. The 10K offers an 800 foot climb throughout the full distance whilst the 50K route includes almost 5,175 feet of elevation gain through the race.
Event Details
What’s Included
Raceday Logistics
Spectators
Volunteers
Frequently Asked Questions
Is the San Lorenzo run a cupless event and do I need to bring my own water bottle?
Yes, in the hope of protecting the environment this event will not be supplying water cups at aid stations. Runners must bring their own water bottle which they can refill at the stations if they need to.
Is there a cut-off time at the San Lorenzo run?
Yes, there is a 9 hour cut-off time for all distance.
Is the San Lorenzo run hilly?
No, this is a pretty flat race. The half marathon (longest distance) involves only 380 feet of elevation gain over the whole course.
Have a question? Get answers from our team.
Is your question about booking your place? See our Help Center
San Lorenzo River weather forecast
Partly cloudy throughout the day.
68°F
Predicted highs
54°F
Predicted lows
Light breeze possible, up to 8mphMeet the organizer
Our events are located in amazingly beautiful parks and recreation areas in California. We are known for our well-marked courses, accurately measured distances, immediate race results, quality shirt designs, and low-key, friendly atmosphere.
For courses that are designed to be easier, flatter, and faster, check out one of our Zoom or ZombieRunner events.
We have organized over 400 events during the past 16 years. We love trail running and we promise you a rewarding experience.
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