About the SPASM Lake Chabot Trail Run
The course runs through Lake Chabot Regional Park, mixing paved paths with dirt roads and some single-track sections in the hills above Castro Valley. The shorter option stays mostly on pavement with modest climbing, while the longer distances push deep into the park on dirt, gaining real elevation and covering terrain that earns its difficulty. Trail shoes are worth considering regardless of distance.
Check-in and the start are both at the park marina. Pickup runs race morning only, so arriving well before your wave matters. Parking requires exact cash change at the entry gate. Those running the longer distances can stow a bag of non-valuables at the start and finish area.
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Finish-Time Stats
Going by the 2026 results, this is a small, friendly field, with a competitive front end and a big recreational middle.
13.1 Miles · 2026 results
62finishers
1:45:10winner
2:37:46median
4:19:03cutoff
Top 3: Robin Feng (1:45:10) · Alberto Tempia Bonda (1:49:20) · Tommy Evans (1:49:44)
5 Miles · 2026 results
51finishers
33:56winner
57:12median
2:28:04cutoff
Top 3: K. Chin (33:56) · Michael Ross (36:18) · Rai Rangel Arroyo (36:36)
31 Miles · 2026 results
20finishers
4:25:29winner
5:55:37median
8:39:48cutoff
Top 3: Adam Wolf (4:25:29) · Anthony Ryans (4:39:25) · Jace Wolfe (5:05:29)
26.2 Miles · 2026 results
13finishers
4:15:32winner
5:24:03median
8:10:37cutoff
Top 3: Youssef Gad (4:15:32) · Montana Cohn (4:24:07) · Katie Junghans (4:24:46)
17.9 Miles · 2026 results
12finishers
2:50:19winner
4:26:01median
6:41:27cutoff
Top 3: Lauren Carrizosa (2:50:19) · Grace Weitz (2:51:34) · Dylan Coyne (2:57:31)
The SPASM Lake Chabot Trail Run has been held every year since at least 2022. That is as far back as RunSignup's records for this race go, so it may well be older.
How we calculate these stats: RunSesh calculates these figures from the most recent published results of past editions, sourced from RunSignup. We show aggregates only: field size, winning and median times, and the cutoff. We never publish individual finisher tables. Last updated Jul 27, 2026.
Distances & Start Times
5 Miles4/24/2027 08:45$60
13.1 Miles4/24/2027 08:30$70
17.9 Miles4/24/2027 08:30$75
26.2 Miles4/24/2027 08:30$80
31 Miles4/24/2027 08:30$90
50 Yards4/24/2027 08:20Free
2 Miles4/24/2027 08:20Free
Going for a Time?
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Where to Stay
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