SPASM Lake Chabot Trail Run
When is SPASM Lake Chabot Trail Run?
SPASM Lake Chabot Trail Run takes place on Saturday, April 11, 2026 in Castro Valley, CA.
What distances does SPASM Lake Chabot Trail Run offer?
SPASM Lake Chabot Trail Run offers 6 events: 5K, 8K, Half Marathon, 30K, Marathon, 50K.
| Event | Distance | Price | |
|---|---|---|---|
| 5K | 3.1 mi | $0.00 | Register |
| 8K | 5.0 mi | $60.00 | Register |
| Half Marathon | 13.1 mi | $70.00 | Register |
| 30K | 17.9 mi | $75.00 | Register |
| Marathon | 26.2 mi | $80.00 | Register |
| 50K | 31.0 mi | $90.00 | Register |
How much does SPASM Lake Chabot Trail Run cost?
Registration for SPASM Lake Chabot Trail Run starts at $0.00. Prices vary by event distance.
Where is SPASM Lake Chabot Trail Run held?
SPASM Lake Chabot Trail Run is held in Castro Valley, CA at Lake Chabot Regional Park - Marina.
About SPASM Lake Chabot Trail Run
The course starts at the Marina and travels around the popular Lake Chabot reservoir and surrounding hills. Great course for first-time trail runners!
(Distances are accurately measured using a Rolatape® surveyor's measuring wheel.)
Awards
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.
Cancellation Policy
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.
Bib Number & Shirt Pick-up
Race Day: Check-in beginning at 7:30 a.m. at the Lake Chabot Regional Park - Marina. Please arrive 45min before your event to receive your bib and shirt. Event start times are listed here.
Parking is $5 per vehicle. Please bring exact change to expedite entry.
Drop Bags (30K/Marathon/50K): You can leave a drop bag with non-valuables at the Start/Finish.
Shirts
To guarantee a shirt, please register 10 business days prior to the event.
Time Limit & Cut-off
Marathon - 8.5 hours (4 hrs, 12:30 p.m. @ 13 mi)
50K - 8.5 hours (3 hrs 15 min, 11:45 a.m. @ 13 mi)
All Events - 8.5 hours
Elevation Profiles/Course Surface
8K
Elevation Gain: 380'
Course Surface: Single Track (16%), Dirt Road (12%), Asphalt (72%)
Half Marathon
Elevation Gain: 1,450'
Course Surface: Single Track (14%), Dirt Road (60%), Asphalt (26%)
30K
Elevation Gain: 1,830'
Course Surface: Single Track (14%), Dirt Road (48%), Asphalt (38%)
Marathon
Elevation Gain: 2,900'
Course Surface: Single Track (14%), Dirt Road (60%), Asphalt (26%)
50K
Elevation Gain: 3,280'
Course Surface: Single Track (14%), Dirt Road (53%), Asphalt (33%)
Aid Stations
Fully-stocked aid stations every 4 - 5 miles. You can expect fresh fruit, salty snacks, assorted candy, water, and Skratch electrolyte sports drink. It is highly recommended that runners carry at least 20 oz. of water between aid stations.
Cupless
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!