San Lorenzo River Trail Run
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About
Run along the San Lorenzo River in the shadow of ancient redwoods, rivers and green meadows. This event has everything from a 50k to a 10k and more giving runners a chance to compete and set a new personal best. Do bring your runner friends along for a challenge which presents stunning views.
30k, Half Marathon, 10k, and 2 more
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Sat, Jun 18, 2022
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Santa Cruz, United States
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4.8(3 Reviews)
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Where and when
Location
Harvey West Park, 326 Evergreen St, Santa Cruz, CA 95060, USA
Start times
Sat, Jun 18, 2022
30k:
8:00am | Half Marathon:
8:00am | 10k:
8:15am | 50k:
8:00am | Marathon:
8:00am Races summary
Here's what races are available for San Lorenzo River Trail Run
1 / 2
10k
10km
$50.00 - $70.00
Half Marathon
13.1mi
$50.00 - $65.00
30k
30km
$60.00 - $75.00
Marathon
26.2mi
$65.00 - $80.00
Route information
This unique and wonderful race takes place along the San Lorenzo river a stretch of land that is full of scenic views. The tracks follow an even mixture of single track and dirt roads. There will be a FREE Kids Fun Run at 7:50am!
You will run through 300 foot tall Coastal Redwoods, canyons, open meadows, pine and oak forests, and high dry chaparral-covered ridges.
There will be fully-stocked aid stations every 6 - 7 miles. You can expect fresh fruit, salty snacks, assorted candy, water and Clif Shot Electrolyte sports drink. Fluids will served by event staff. It is highly recommended that runners carry at least 20 oz. of water between aid stations.
The course will be marked with ribbon approximately every 200 yards and color coded as follows:
- 10k – yellow
- Half Marathon – pink
- 30k – Pink to Henry Cowell Aid Station + Orange Loop (5 miles, counterclockwise) + Pink to Start/Finish
- Marathon – Half Marathon (twice!)
- 50k – 30k + Half Marathon
Course Surfaces
10k - (Elevation Gain 800', 59% Single Track, 41% Dirt Road)
Half Marathon - (Elevation Gain 2,175', 58% Single Track, 42% Dirt Road)
30k - (Elevation Gain 3,000', 62% Single Track, 38% Dirt Road)
Marathon - (Elevation Gain 4,350', 58% Single Track, 42% Dirt Road)
50k - (Elevation Gain 5,175', 60% Single Track, 40% Dirt Road)
Organizer route images
What's included
- Finisher's Medal
- Event T-Shirt
- Refreshments & Aid stations
- The top 3 male and female overall winners of every distance will win an award and race credits to future Coastal races
- 50k finishers will also receive a custom coaster
How to get there
Harvey West Park, 326 Evergreen St, Santa Cruz, CA 95060, USA
Get full directionsBy Car
Exit the CA-9 onto Coral St, and follow the road until you reach the event.
Parking
Parking will be available in surrounding areas.
Event day logistics
7am-7:45am Registration and Bib Number pickup at Harvey West Park
7:50am FREE Kids fun run
8am 50k, 30k, Marathon and Half Marathon start
8:15am 10k start
Cut-off Times
There will be time limits in place for the Marathon and 50k which are as follows:
- Marathon - 9 hours
- 50k - 9 hours
Entrants must have reached 13 miles by 12:15pm for the Marathon and 18 miles by 1pm for the 50k to be allowed to continue.
Headphones
Headphones are allowed on dirt road sections only. Please do not wear headphones on single-track trail, while crossing paved roads, when getting aid at aid stations, or while crossing the finish line.
Course Markings
The most important markings along the course will be the polka-dot flagging, which indicated a turn at an intersection. There will be at least two of these flags before a turn in the course, which will be placed before and on the same side as the required turn.
As you start to approach the intersections, please look for any polka-dot flags before turning. Waiting until you're in the intersection to determine the correct direction may be confusing and you may go the wrong way.
After you complete the turn, there will be orange and/or pink flagging indicating the correct route. We also hang blue ribbons at critical junctions indicating the wrong way. Blue is bad!
If you go 3-4 minutes without seeing your respective flagging, it's likely you've gone off course and should retrace your path until you find the course again.
Please be courteous on the trail. If you're passing another runner or hiker, announce "on your left" as you approach.
Aid Stations
Aid stations will be available every 6-7 miles which will be fully stocked with fresh fruit, salty snacks, assorted candy, water, and Clif Shot Electrolyte sports drinks.

Coastal Trail Runs
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.
FAQ's
Is the San Lorenzo River Trail 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 River Trail Run?
Yes, there is a 9 hour cut-off time for all distance.
Is the San Lorenzo River Trail 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.
Reviews
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