Skip to main content
Sat November 16, 2024 Castro Valley, CA 94546 US Directions
RaceJoy Ready



$64.60 $54 8:45AM PST Price increases after November 9, 2024 at 11:59pm PST

Half Marathon

$75.20 $64.60 8:30AM PST Price increases after November 9, 2024 at 11:59pm PST


$80.50 $69.90 8:30AM PST Price increases after November 9, 2024 at 11:59pm PST


$85.80 $75.20 8:30AM PST Price increases after November 9, 2024 at 11:59pm PST


$96.40 $85.80 8:30AM PST Price increases after November 9, 2024 at 11:59pm PST

Kid's Run (6yo & younger, 50yd dash) - Free!

$0 8:20AM PST Registration ends November 16, 2024 at 8:25am PST


Lake Chabot Regional Park - Marina
17600 Lake Chabot Road
Castro Valley, CA US 94546


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.)

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: You can leave a drop bag with non-valuables at the Start/Finish.

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


The course will be marked with ribbon approximately every 200 yards and color coded as follows:

8K – Yellow Loop
Half Marathon – Pink Loop
30K – Pink Loop + Yellow Loop
Marathon – Pink Loop twice!
50K - Marathon + 8K

The most important course marking is the polka-dot flagging. It indicates a turn at an intersection. There will be at least two polka-dot flagging before a turn in the course. The polka-dot flagging will be placed before and on the same side as the required turn. As you approach an intersection, look for any polka-dot flagging before the turn. 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 yellow, 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 don't see your respective flagging for 3-4 minutes, you are off course. If you get off course, you should retrace your path until you find where you left the course and then continue along the marked course.

Please be courteous on the trail. If you're passing another runner or hiker, announce "on your left" as you approach.

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.

Your bib number indicates the distance that you're running. If you want to change your distance, please send us an e-mail or let us know by check-in, at the latest.

Many of the parks in California have poison oak. We recommend staying on the trail and washing with Tecnu after your trail run. Occasionally, bees or yellow jackets may be active and precautions should be taken if you're allergic.

No dogs allowed on the course. Please don't leave pets in your vehicle.

GPX Files:

Click the icon below to download the attached PDF.


Elevation Profiles/Course Surface


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%)




Elevation Gain: 1,830'
Course Surface: Single Track (14%), Dirt Road (48%), Asphalt (38%)
30K profile = Half Marathon + 8K




Elevation Gain: 2,900'
Course Surface: Single Track (14%), Dirt Road (60%), Asphalt (26%)




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 Clif Shot Electrolyte sports drink. It is highly recommended that runners carry at least 20 oz. of water between aid stations.

Click the icon below to download the attached PDF.



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!


We use state-of-the-art Bibtags by MyLaps to accurately time each runner’s finish time. Results are published on the website every 30 minutes.


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.

Note: Overall and age group placing are based on Clock Time rather than Chip Time.  As a bona fide competition, runners should start at the same time and compete against each other on the course.  Chip Time is used so runners can see their actual elapsed time.

Course Records

  Zachary Chabot, 22, Manchester, NH ('15)      27:57
  Laura Vogel, 26, San Francisco, CA ('15)        35:06
Half Marathon
  Marco Aceves, 28, San Jose, CA ('21)          1:28:24
  Sarah Polidori, 32, Castro Valley, CA ('22)    1:36:18
  James Scanlan, 52, San Francisco, CA ('21)   2:04:17
  Sasha Teninty, 25, San Francisco, CA ('17)     2:21:54
  Vincent Dimassa, 26, Berkeley, CA ('19)          2:58:56
  Verity Breen, 55, San Rafael, CA ('22)               3:58:23
  Bob Shebest, 43, Windsor, CA ('17)                3:47:35
  Katherine Song, 32, Albany, CA ('22)              4:11:30

Foggy Bay Photos


Race Contact Info

If you have any questions about this race, click the button below.



Like this page and invite your friends on Facebook.

Sign up to Stay in Touch!

Please join the Coastal mailing list.

If you continue to use this site, you consent to use all cookies. We use cookies to offer you a better browsing experience. Read how we use cookies and how you can control them by visiting our Privacy Policy.

If you continue to use this site, you consent to use all cookies.