Pacific Northwest 5K
Pacific Northwest 5K race day weather
Comfortable temps, warming through the race
Mild 54°F temps at gun time mean comfortable early miles without overheating risk. Temperatures rising to 69°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing. High humidity (84%) will make it harder to cool down through sweat — increase fluid intake accordingly.
Pace Calculator
Enter a finish time to see what race day does to it.
Get forecast alerts for Pacific Northwest 5K
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Get your personalized Pacific Northwest 5K race plan
A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.
About the Pacific Northwest 5K
The Pacific Northwest Marathon 5K covers 3.1 miles out and back from Harrisburg Middle School in Harrisburg, Oregon, on the Saturday of race weekend. It turns around about 1.6 miles from the start and returns to the school for the finish. The race describes its Willamette Valley courses as flat, with few turns, each marked with arrows, chalk and volunteers.
