Run Boulder Events

Where will you be on Mother's Day? Join us for a new Boulder tradition! The Mother's Day Heart and Sole Half Marathon, 10k & 5k is less than 1 week away! Run as a Mother/Daughter or Mother/Son team! Cinch bag, race shirt, race hat, and finisher's medal included. Registration closes in 4 days. Come run with us!
Register: https://raceroster.com/events/2024/84191/the-mothers-day-heart-and-sole-half-marathon-10k-and-5k

Mother's Day

Don't Miss out!!... Hello 303 Family!! In case you haven’t heard, 303 Running will be hosting the Mother’s Day Heart and Sole Half-Marathon/10k/5k taking place on May 12, 2024 at the beautiful Boulder Reservoir. Having been named Colorado’s Best Half Marathon by the Colorado Runner magazine. We will have special ...