October wraps up with a short but appropriately spooky batch of races, with Halloween landing on a Saturday this year. The week starts with another Portland Trail Series event before things really get into costume territory, with Halloween 5Ks, the Giddy Up Ranch Run, and a Día de los Muertos event rounding out the calendar.
There’s still some variety if dressing up isn’t your thing, including the Thunder River trail races in Cascade Locks and the Oregon Brewery Running Series in Portland. But with Halloween falling on race day, this might be the perfect excuse to trade your usual running kit for something a little more festive — especially if you can figure out how to run a 5K in a cowboy costume.
| Race Name | Date | Location | Distances | Registration Links |
|---|---|---|---|---|
| Portland Trail Series – Fall | October 28, 2026 | Portland, OR | 6M, 4M Trail Run | Register Here |
| Run With The Duck | October 30, 2026 | Eugene, OR | 5K | Register Here |
| ADFK 5K | October 31, 2026 | Salem, OR | 5K | Register Here |
| Giddy Up 5K and 5 Miler Ranch Run | October 31, 2026 | Sisters, OR | 5M, 5K | Register Here |
| Oregon Brewery Running Series – Level | October 31, 2026 | Portland, OR | 5K | Register Here |
| Dia De los Muertos | October 31, 2026 | Hockinson, WA | 5K | Register Here |
| Thunder River | October 31, 2026 | Cascade Locks, OR | 50K, 25K Trail Run | Register Here |
