About the Summit Rock
The courses run through redwood groves in Sanborn County Park, on single-track trails mixed with fire roads and a short stretch of pavement. The canopy keeps things shaded and the terrain is genuinely hilly, with the half marathon and longer distances climbing to the top of the park. Experienced trail runners will find it technical enough to be interesting, and walkers on the uphills are very much the norm here.
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Summit Rock 2025 Results
Going by the 2025 results, this is a small, friendly field, with a competitive front end and a big recreational middle.
5K Results · 2025
118finishers
29:43winner
48:49median
1:43:50cutoff
Top 3: Romain Nguyen (29:43) · Sabino Armenta (30:18) · Gio Fata (30:37)
Half Marathon Results · 2025
112finishers
1:44:55winner
3:03:00median
4:51:15cutoff
Top 3: Taro Moberly (1:44:55) · Cameron Custer (1:54:19) · Nate Wolford (2:00:49)
6.32 Miles Results · 2025
91finishers
1:08:16winner
1:36:25median
3:45:35cutoff
Top 3: J. Saito (1:08:16) · Christopher Gutnajer (1:08:24) · Riccardo Tarelli (1:08:49)
The Summit Rock has been held every year since at least 2017. 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 Nov 12, 2026.
Distances & Start Times
5K12/12/2026 09:00$83
10K12/12/2026 08:45$92
13.1 Miles12/12/2026 08:30$110
REMOTE RUNNER12/12/2026 07:30$60
Going for a Time?
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Not sure what to aim for? The 5K pace chart lists the pace for every finish time.
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