2025 - The Rock the Loch 5K/10K/Half Marathon (LIVE or Virtual)
2025 distances
Running
The Rock the Loch Half Marathon (VIRTUAL)
The Rock the Loch 10K (VIRTUAL)
The Rock the Loch 5K (VIRTUAL)
Trail running
The Rock the Loch Half Marathon (LIVE)
The Rock the Loch 10K (LIVE)
The Rock the Loch 5K (LIVE)
Race date Weather
Conditions on June 27, 2025 — historical Open-Meteo data.
Course
Route map and elevation profile
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
Reviews
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Other races near Castro Valley
Different organizers, within 40 miles, in the next three months
Lake Chabot Trail Run
Garin Park XC Challenge
10K On The Bay
Rocky Ridge
Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 7 Castro Valley events
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