# Running Races in Frederick, CO (2026)

> 3 upcoming races in and around Frederick, Colorado.

- **Page:** https://runthis.run/races/colorado/frederick

## Races

- **[CEROX + IRON + IRON X](https://runthis.run/event/rs-211716-cerox-iron-iron-x)** — Sat, Sep 19, 2026 · 12:00 AM UTC · Frederick, CO
- **[Cerox Championships](https://runthis.run/event/rs-214711-cerox-championships)** — Sat, Oct 10, 2026 · 12:00 AM UTC · Frederick, CO
- **[Hyrox Sim](https://runthis.run/event/rs-207280-hyrox-sim)** — Sat, Oct 17, 2026 · 12:00 AM UTC · Frederick, CO

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Source: [https://runthis.run/races/colorado/frederick](https://runthis.run/races/colorado/frederick) — data from Run This (runthis.run).