Portland Marathon
Race Day Weather
Cool start, warming finish
Runners will face a temperature rise from 48°F at the start to 57°F by the finish. With humidity at 68% and a light wind, hydration should be prioritized. The gently rolling course will allow for a strong finish, but runners should consider a conservative start to adapt to the warming conditions. Expect mild challenges in the middle miles as temperatures gradually climb.
Pace Calculator
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
Weather-adjusted pacing, per-mile terrain splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide — all personalized to your goal and race-day conditions.
Race Info
The Portland Marathon is held on the first Sunday of October in Portland, Oregon. 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 marathon is a USATF-certified Boston qualifier, and the 2026 race drew nearly 15,000 participants across all events. Wikipedia
