SPASM Crystal Springs Trail Run
⚠️ 2027 edition: provisional information
The date is estimated from the 2026 edition (August 30, 2026), on the same day of the week. Courses, start times, fees and description are carried over from the previous edition: check them on the official website. This page will be updated as soon as the organizer publishes them.
Available distances
About
The SPASM Crystal Springs Trail Run in Woodside, California, in San Mateo County, offers a 50K (31 miles), a marathon (26.2 miles), a 35K (21.7 miles), a half marathon (13.1 miles) and an 8K. It takes place on August 29, 2027: the 50K, marathon and 35K start at 8:00 a.m., the half marathon at 8:30 a.m. and the 8K at 8:45 a.m.
The trails run through Huddart Park, King's Mountain and Bear Gulch, among redwoods and ferns. The event suits experienced trail runners and curious beginners keen to discover the outdoors alike, with accurately measured distances for a well-organized race.
Prepare for SPASM 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.
Crystal Springs Trail Run
Jan 17, 2027 · Woodside, CA · 0 mi away
5 mi · 13.1 mi · 21.7 mi · 26.2 mi
Woodside Ramble
Dec 19, 2026 · Redwood City, CA · 4 mi away
31.1 mi · 21.7 mi · 13.1 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
Coyote Hills Half Marathon/10k/5K
Jan 30, 2027 · Fremont, CA · 12 mi away
13.2 mi · 6.2 mi · 3.1 mi
ZombieRunner Quarry Lakes
Nov 14, 2026 · Fremont, CA · 17 mi away
3.1 mi · 6.2 mi · 13.1 mi