San Lorenzo River Trail Run

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.)

Marathon - 9 hours (4 hrs 15 min, 12:15 p.m. @ 13 mi)

50K - 9 hours (5 hrs, 1:00 p.m. @ 18 mi)

All Events - 9 hours

Entry fees to Coastal events are non-refundable.

DEFER YOUR ENTRY
To defer an event that is scheduled as planned:

Things happen or you change your mind. If you're just not able to make the event that you had planned on, here are your options:

• Up until 7 days from the start time of the first event, you can defer 100% value of your registration to a future event for a deferment fee of $10. You will be given a credit for the amount paid, minus any discounts and service fees, to be used at a future event.
  
• Up until 72-hours from the start time of the first event, you will be given a credit for 50% of the amount paid towards a future event, minus any discounts and service fees, to be used at a future event.
  
• Up until 72-hours from the start time of the first event, you can transfer your registration of the current event to another runner for a transfer fee of $10.

Please use the Contact this Race form and notify us within the time frame stated above.

All requests within 72-hour from the start time of the first event will not earn credit nor be eligible for a transfer.

All race credits earned will be good for one calendar year from the time it was issued.

EVENT CANCELLATIONS
We host events rain or shine but in the unfortunate circumstance that an event is:

• canceled or rescheduled - you will receive a 75% credit of your registration fee (minus processing and other fees incurred), applicable to future events
• relocated - we will automatically transfer the registration over to new venue.

Race Day: Check-in beginning at 7:00 a.m. at Harvey West Park (Friendship picnic area). Please arrive 45min before your event to receive your bib and shirt. Event start times are listed here.

Parking is free.

Drop Bags (30K/Marathon/50K): You can leave a drop bag with non-valuables at the Start/Finish.

To guarantee a shirt, please register 10 business days prior to the event.

10K

Elevation Gain: 800'

Course Surface: Single Track (59%), Dirt Road (41%), Asphalt (0%)

Half Marathon

Elevation Gain: 2,175'

Course Surface: Single Track (58%), Dirt Road (42%), Asphalt (0%)

30K

Elevation Gain: 3,000'

Course Surface: Single Track (62%), Dirt Road (38%), Asphalt (0%)

Marathon

Elevation Gain: 4,350'

Course Surface: Single Track (58%), Dirt Road (42%), Asphalt (0%)

50K

Elevation Gain: 5,175'

Course Surface: Single Track (60%), Dirt Road (40%), Asphalt (0%)

Fully-stocked aid stations every 6 - 7 miles. You can expect fresh fruit, salty snacks, assorted candy, water, and Skratch electrolyte sports drink. If you would like to be sure that you have any other specific item at the event, you should carry it with you. Additionally, it is highly recommended that runners carry at least 20 oz. of water between aid stations.

In an effort to reduce waste and litter, Coastal/Zoom events are cupless. We request that you bring your preferred means of containing fluids during your run and at the aid stations. We will have some Hydrapak SpeedCup ($5) for sale at check-in.

Please note that there are no pre-filled cups of hydration at the aid stations. In case you really need a disposable cup, please request one from the aid station volunteers. We ask that you use only one. Thank you!

T-shirts will be given to all pre-registered runners. All finishers will receive a custom medal and 50K finishers will also receive a custom coaster.

Overall Winners: The top 3 male and female overall winners of every distance will win an award and race credits to future Coastal races:

1st Place - $50
2nd Place - $35
3rd Place - $20
 

These race credits are valid for 3 months from date of issue and is for one time use only.

Top three finishers in each age group and gender will receive award medals.

10K

  Andrew Wilkey, 32, Hayward, CA ('25)      37:55

  Aksiniya Asenova, 32, Sunnyvale, CA ('15) 44:33

Half Marathon

  Digger Lauter, 37, Oakland, CA ('21)         1:27:45

  Sophia Ditty, 32, Santa Cruz, CA ('22)       1:46:20

30K

  James Ratliff, 19, Santa Cruz, CA ('25)       2:10:09

  Isabel Sanchez, 22, Santa Cruz, CA ('25)    2:29:45

Marathon

  Robert Landauer, 28, Mountain View, CA ('13) 3:26:35

  Amy Burton, 39, San Jose, CA ('13)                  4:03:21

50K

  Kevin Stewart, 29, Gilroy, CA ('19)                       4:13:33

  Malene Blikkenhauk, 22, Sogndal, Norway ('14)  4:39:24

• 2025

• 2024

• 2023