# Denver Colfax Marathon 2027: registration status, dates and how to enter

Yes. Denver Colfax Marathon 2027 is open for entry as of 2026-10-27; the status has read registration open since at least 2026-10-27; race day 2027-05-15.

- Organiser: Denver Colfax Marathon
- Sport: marathon
- Where: Denver, Colorado, US
- Site: https://www.runcolfax.org/
- Registration page: https://www.runcolfax.org/
- Race day: 2027-05-15
- Registration status: registration open (checked 2026-10-27)
- Entry route: first-come

Marathon weekend May 15-16, 2027 (marathon, half, urban 10 miler, relays, 5K).

## Quick answers

**Is Denver Colfax Marathon 2027 registration open?**

Yes. Denver Colfax Marathon 2027 is open for entry as of 2026-10-27; the status has read registration open since at least 2026-10-27; race day 2027-05-15.

**How do you get a place in Denver Colfax Marathon 2027?**

Entries are first come, first served. Marathon weekend May 15-16, 2027 (marathon, half, urban 10 miler, relays, 5K).

**How can I be alerted when Denver Colfax Marathon 2027 registration changes?**

Race Entry Watch reads Denver Colfax Marathon 2027's registration page every night, hourly in the week before a stated opening date and every ten minutes on the day itself, and records the sentences about entries that appear on it. A free weekly digest is on this page; the same-day email, the moment it opens, closes or sells out, is 4 USD a month or a 30-day pass for 5 USD at https://bikoosh.com/races/colfax-marathon.

## Sources

- https://www.runcolfax.org/ (read 2026-10-27)

## Changes

- 2026-10-27: record added

Canonical: https://bikoosh.com/races/colfax-marathon
Race Entry Watch is an independent, sourced tracker, not affiliated with any organiser. Every status is read on the event's own registration page on the date shown; dates and fees are quoted as the organiser states them; an entry is yours to make on the organiser's site.