# 10K Races in Castro Valley, CA (2026)

> 3 upcoming 10K races in Castro Valley, California.

- **Page:** https://runthis.run/races/california/castro-valley/10k

## Races

- **[Brazen New Year's Eve](https://runthis.run/event/rs-211478-brazen-new-years-eve)** — Fri, Jan 1, 2027 · 12:00 AM UTC · Castro Valley, CA · 5K / 10K / Marathon
- **[Brazen New Year's Day](https://runthis.run/event/rs-55369-brazen-new-years-day)** — Fri, Jan 1, 2027 · 12:00 AM UTC · Castro Valley, CA · 5K / 10K / Marathon
- **[Bad Bass](https://runthis.run/event/rs-64587-bad-bass)** — Sat, Jul 24, 2027 · 12:00 AM UTC · Castro Valley, CA · Marathon / 6.4 mi / 3.3 mi

## Nearby

- [All races in Castro Valley, CA](https://runthis.run/races/california/castro-valley.md)
- [10K races in California](https://runthis.run/races/california/10k.md)

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Source: [https://runthis.run/races/california/castro-valley/10k](https://runthis.run/races/california/castro-valley/10k) — data from Run This (runthis.run).