SPASM Crystal Springs Trail Run
Apr 11, 2026 at 7:30 AM
SPASM Crystal Springs Trail Run
Castro Valley CA, 94546
USA
Entry Fee $54
(Lowest or Early Registration)
Entry Fee 2 $96
(Highest or Late Registration)
Prize Money: no
Distance(s):
- 13.1M
- 26.2M
- 30K
- 50M
- 8K
Type: Trail
Percent of the course on un-paved trails: 95%
First Year of the Event: 2014
Description: Place Lake Chabot Regional Park - Marina 17600 Lake Chabot Road Castro Valley, CA US 94546 Description 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 (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 Course 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.
Photos
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