December may mark the end of the year, but Oregon’s racing calendar is anything but slowing down. Holiday-themed fun runs, winter trail challenges, year-end traditions, and plenty of festive 5Ks fill the month with energy—and more than a little seasonal spirit.
Whether you’re chasing one last PR before the calendar flips, jumping into a costume run with friends, or logging miles to balance out those holiday treats, there’s something for every runner.
With events happening nearly every weekend, December closes out the year on a high note for the PNW running community.
| Race Name | Date | Location | Distances | Registration |
|---|---|---|---|---|
| Jingle Bell 5K Relay | Dec 6, 2025 | Salem, OR | 5K run, 5K relay | More Information |
| Oregon Brewery Running Series – Backwoods & Deschutes | Dec 6, 2025 | Portland, OR | 5K run | More Information |
| Reindeer Run | Dec 6, 2025 | Saint Helens, OR | 13.1M, 10K, 5K run | More Information |
| Ugly Sweater Fun Run 5K | Dec 6, 2025 | Klamath Falls, OR | 5K run | More Information |
| Ugly Sweater Run | Dec 6, 2025 | Canby, OR | 5K run | More Information |
| Ugly Sweater Run and Walk | Dec 6, 2025 | Sisters, OR | 5K run | More Information |
| Ho Ho 5K | Dec 7, 2025 | Portland, OR | 5K run | More Information |
| Holiday Sweater Stroll | Dec 7, 2025 | Eugene, OR | 5K run | More Information |
| Frozen Trail Run Fest | Dec 13, 2025 | Eugene, OR | 50K, 14.6M, 8.2M, 5K trail run | More Information |
| Mac’s Run | Dec 13, 2025 | Coos Bay, OR | 10K, 5K run | More Information |
| PRC Winter 5K Race Series | Dec 13, 2025 | Beaverton, OR | 5K run | More Information |
| Holiday Half Marathon | Dec 14, 2025 | Portland, OR | 13.1M, 15K, 10K, 5K run | More Information |
| Candy Cane Dash 3K/5K | Dec 20, 2025 | Warren, OR | 5K, 3K run | More Information |
| Ugly Holiday Sweater Run | Dec 20, 2025 | Tualatin, OR | 5K novelty run | More Information |
| Jingle Bells Run | Dec 21, 2025 | Eugene, OR | 15K, 5K run, kids run | More Information |
| Longest Night Mile | Dec 21, 2025 | Phoenix, OR | 1M run | More Information |
| First Run 10K/5K | Dec 31, 2025 | Eugene, OR | 10K, 5K run | More Information |
