Available distances
About
The SPASM Crystal Springs Trail Run takes place in Woodside, California, amid the landscapes around Redwood City and San Mateo. Runners cover trails through Huddart Park, King's Mountain, and Bear Gulch, surrounded by redwoods and ferns. Distance choices span 5 miles, a half marathon (13.1 miles), 21.7 miles, a full marathon (26.2 miles), and a 50K (31 miles), making the event open to seasoned trail runners and beginners alike. The course is precisely measured to give every participant an accurate, well-organized race experience, set in one of the Bay Area's most scenic stretches of protected forest.
Prepare for Crystal Springs Trail Run with RunRun
An AI-generated training plan, adjusted every week based on your real sessions. Built around your goal, current level and race date.
- Personalized plan based on your VO2max, history and weekly availability
- Strava and Garmin sync: your sessions are analyzed and the plan adapts
- Target paces, long runs, key sessions: everything is calculated for race day
Races nearby
Other upcoming races around Woodside.
Woodside Ramble
Dec 19, 2026 · Redwood City, CA · 4 mi away
31 mi · 22 mi · 13 mi · 6.2 mi
Palo Alto 10K, 5K Run/Walk and Double 15K
Dec 12, 2026 · Palo Alto, CA · 6 mi away
1 mi · 3.1 mi · 6.2 mi · 9.3 mi
Thanksgiving Gobble Trot Run 5K/10K/13.1 SAN FRANCISCO
Nov 28, 2026 · San Mateo, CA · 10 mi away
13.1 mi · 6.2 mi · 3.1 mi · 1 mi
The Newark Mile 4k
Sep 19, 2026 · Newark, CA · 14 mi away
2.5 mi
ZombieRunner Quarry Lakes
Nov 14, 2026 · Fremont, CA · 17 mi away
3.1 mi · 6.2 mi · 13 mi
Diwali Fun Run + Festival
Nov 14, 2026 · Fremont, CA · 17 mi away
6.2 mi · 3.1 mi