The Boulder Stroke & Stride enters its 24th season in 2025, 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!

Stroke & Stride happens weekly on Thursday nights throughout the Summer from June 5th to August 7th WITH THE EXCEPTION OF Thursday June 12th.  Stroke & Stride will instead be held on Wednesday June 11th.