
Sponsored by:

Have an event to List?
Whether a race, special group ride, training opportunity, or cycling-related community event, the 303 calendar showcases it all. To have an event posted here please follow this link: Event Policy Submission & Guidelines.


- This event has passed.
Boulder Stroke & Stride Series
July 4, 2019
Boulder Reservoir
The Boulder Stroke & Stride enters its 18th season in 2019, 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 9 Thursday evenings throughout the summer. Many participants make their open-water swimming debut in the beginner-friendly Stroke & Stride 750 meter swim. 250-400 participants enjoy the Stroke & Stride every week! Live timing, great post race food, hooded sweatshirts for 6-pack entries, and series prizes are just the beginning!
May 30th, June 6th, June 13th, June 20th, June 27th, July 11th, July 18th, August 1st
Event details and registration here