Pacific Northwest Marathon
Pacific Northwest Marathon race day weather
Cool temps, humid conditions
Runners will face a steady temperature rise from 52°F at the start to a peak of 60°F. With humidity levels at 94% and a gentle 6 mph wind from the SE, pacing adjustments are crucial. It's advisable to start conservatively to combat the humidity and ensure adequate hydration throughout the race.
Pace Calculator
Enter a finish time to see what race day does to it.
Get forecast alerts for Pacific Northwest Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Pacific Northwest Marathon route and elevation
The Pacific Northwest Marathon course has about 80 ft (24 m) of climbing and 80 ft (24 m) of descent, and finishes near the elevation it starts. It is flatter than 77% of the marathon courses racecast.io has mapped, measured by what the hills cost in time. It has no steep miles: no mile climbs more than 15 ft (5 m).
Biggest climbs
- Miles 1.8 to 10.1: climbs about 55 ft (17 m).
What the hills cost
- 3:30 on a flat course is about 3:30:25 here (25 seconds slower).
- 4:00 on a flat course is about 4:00:30 here (30 seconds slower).
- 4:30 on a flat course is about 4:30:30 here (30 seconds slower).
Hills only, priced mile by mile on the course map. The pace calculator above adds the race-day weather.
Even-effort splits for a 3:30, 4:00 or 4:30 finish
| Mile | Climb | Descent | 3:30 | 4:00 | 4:30 |
|---|---|---|---|---|---|
| 1 | 8 ft | 5 ft | 8:01 | 9:10 | 10:18 |
| 2 | 9 ft | 5 ft | 8:02 | 9:10 | 10:20 |
| 3 | 3 ft | 2 ft | 8:00 | 9:09 | 10:17 |
| 4 | 10 ft | 1 ft | 8:04 | 9:14 | 10:23 |
| 5 | 8 ft | 4 ft | 8:02 | 9:10 | 10:19 |
| 6 | 6 ft | 0 ft | 8:03 | 9:12 | 10:21 |
| 7 | 9 ft | 2 ft | 8:03 | 9:12 | 10:22 |
| 8 | 9 ft | 2 ft | 8:03 | 9:13 | 10:21 |
| 9 | 7 ft | 3 ft | 8:02 | 9:10 | 10:19 |
| 10 | 14 ft | 3 ft | 8:05 | 9:14 | 10:23 |
| 11 | 3 ft | 8 ft | 7:58 | 9:07 | 10:15 |
| 12 | 1 ft | 9 ft | 7:58 | 9:05 | 10:14 |
| 13 | 6 ft | 10 ft | 7:58 | 9:08 | 10:16 |
| 14 | 9 ft | 9 ft | 8:00 | 9:08 | 10:17 |
| 15 | 9 ft | 1 ft | 8:05 | 9:14 | 10:23 |
| 16 | 9 ft | 1 ft | 8:03 | 9:12 | 10:22 |
| 17 | 5 ft | 14 ft | 7:58 | 9:06 | 10:13 |
| 18 | 4 ft | 3 ft | 8:00 | 9:08 | 10:17 |
| 19 | 2 ft | 11 ft | 7:57 | 9:07 | 10:15 |
| 20 | 3 ft | 9 ft | 7:59 | 9:06 | 10:15 |
| 21 | 1 ft | 6 ft | 7:58 | 9:07 | 10:15 |
| 22 | 3 ft | 9 ft | 7:59 | 9:07 | 10:15 |
| 23 | 2 ft | 8 ft | 7:58 | 9:07 | 10:15 |
| 24 | 2 ft | 6 ft | 7:59 | 9:07 | 10:16 |
| 25 | 3 ft | 7 ft | 7:59 | 9:07 | 10:16 |
| 26 | 6 ft | 7 ft | 7:59 | 9:08 | 10:16 |
| Last 0.2 | 1 ft | 3 ft | 1:47 | 2:02 | 2:17 |
Explore the Pacific Northwest Marathon course with the weather and your pace along the route, or compare it with other races.
Get your personalized Pacific Northwest Marathon 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 Marathon
The Pacific Northwest Marathon offers a flat, fast out-and-back course through the scenic Willamette Valley farmland in Harrisburg, Oregon. With marathon, half marathon, 10K, and 5K options, the event is known for its small race charm, frequent aid stations, and friendly volunteers, making it a great fall tune-up. The USATF-certified course is ideal for runners aiming for personal bests or Boston Marathon qualification.
