Kewash Marathon
Race Day Weather
Cool start — fast day potential, big temp swing
A cool 48°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Temps will climb significantly to 66°F by later miles, so expect fading conditions as the race progresses. Light winds shouldn't be a major factor for pacing.
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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.
