The 2026 Boulder Stroke & Stride Series

June 4th, June 10th (Wednesday), June 18th, June 25th, July 9th, July 16th, July 23rd, July 30th, August 6th 

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BOULDER RESERVOIR SWIM BEACH UPDATE: As of 7/21/2026 the swim beach is open and we have extended registration to 11:59pm tonight (7/22) for the July 23rd Stroke & Stride.

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The Boulder Stroke & Stride enters its 25th season in 2026, and offers Boulder area athletes a fun 1-lap 750 Meter Swim, or 2-Lap 1500 Meter swim in Boulder Reservoir, followed by a 5k run on the reservoir dam on 8 Thursday evenings (plus one Wednesday evening) throughout the summer. Many participants make their open-water swimming debut in the beginner-friendly Stroke & Stride 750 meter event, while more seasoned athletes get the thrill of starting alongside some of the top athletes in the world in the 1,500 meter swim. 250-400 participants enjoy the Stroke & Stride every week!  Live timing, great post race food, beanie for 6-pack entries, and series prizes are just the beginning!

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