Kewash Marathon
Race Day Weather
Cool start, warming trend
Runners will face a temperature rise from 48°F at the start to 61°F by finish. With a light southeast wind at 10 mph and 60% humidity, hydration should be prioritized. Adjusting pace conservatively in the initial miles is advisable as temperatures climb. A throwaway layer may be beneficial pre-race due to the cooler feels-like temperature.
Pace Calculator
Get forecast alerts for Kewash Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
The Kewash Marathon, Half Marathon, 10K & 5K run mostly along the Kewash Nature Trail, a 14-mile former rail corridor of crushed limestone and pavement linking Washington and Keota, Iowa. All distances share a one-mile loop through downtown Washington before splitting onto the trail, starting and finishing near the town square. The event began around 2014 as a half marathon, 10K and 5K organized by the YMCA of Washington County; a full marathon distance was added starting with the 2026 edition.
