Portland Marathon
Race Day Weather
Mild start, warm finish
Runners will face a temperature rise from 55°F at the start to 77°F by the finish, with humidity averaging 68%. Wind will be light and not a significant factor, though there will be headwinds in Miles 2, 7, and 9. As temperatures increase, it's advisable for runners to adjust their pace and stay hydrated, particularly during the warmer later miles.
Pace Calculator
Enter a finish time to see what race day does to it.
Get forecast alerts for Portland Marathon
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 Portland 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.
Race Info
The Portland Marathon is an annual race held on the first Sunday of October in Portland, Oregon, first run in 1972. It offers a full marathon (42.195 km / 26.219 mi), a half marathon (21.098 km / 13.110 mi), and a 10K. The course starts and ends at Tom McCall Waterfront Park at Salmon Street and Naito Parkway, crossing the Willamette River four times and passing through downtown, the Pearl District, and other Portland landmarks. The field has drawn close to 12,000 runners in recent years. Brooksee has produced the race since 2019. Wikipedia
