RunRace USA › Colorado › CEROX IRON + IRON X
CEROX IRON + IRON X
Frederick, Colorado · Saturday, August 22, 2026
Official race page & registration ↗- Date
- Saturday, August 22, 2026
- Location
- Frederick, Colorado
- Entry fee
- from $45
Listing from the 2026 race calendar, refreshed nightly. Details can change: confirm date and entry on the official race page before travelling. Spot an error? Tell us here.
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See every race on the Colorado calendar, or use the Race Finder for maps and filters.