If you are looking for races in Boulder, Colorado, you have come to the right place. Boulder has a growing running scene with 11 races listed in our directory, including 2 upcoming events in 2026. Whether you are lacing up for your first 5K or chasing a new personal record, there is something here for every runner.
Upcoming Races in Boulder, Colorado
Here is a look at the top upcoming races in Boulder this year. We update our listings weekly so you always have the most current information.
Buffalo Bicycle Classic
Date: September 13, 2026
Get ready to pedal through Boulder on Sunday, September 13, 2026, with nine different riding options that’ll match your skill level and adventure style! Read full details →
Girls on the Run Rockies Boulderthon SoleMates 2026
Date: September 27, 2026
Get ready to pound the pavement for an awesome cause! Join us on Sunday, September 27, 2026, in Boulder, Colorado, as a SoleMate and tackle the full marathon while helping Girls on the Run of the Rockies reach their goalswe’ll be cheering you on every step of the way. Read full details →
Why Run in Boulder?
Running events in Boulder offer a mix of community fun runs, charity 5Ks, and competitive road races throughout the year. The local running community is active and welcoming to runners of all levels — from first-timers to seasoned racers. Many of these events benefit local charities and organizations, making race day about more than just your finish time.
Find More Races in Colorado
Boulder is just one part of a thriving Colorado running scene. If you want to explore more events across the state, check out our full race listings for Colorado — we track every upcoming running event from 1 mile fun runs to full marathons.
Get Ready to Race
Found a race you want to run? The next step is making sure you are properly trained for it. Whether you are a first-timer aiming to finish or a veteran chasing a PR, having the right training plan makes all the difference.
Take our free 3-question training plan quiz and get matched to the right plan for your fitness level in under a minute. We will send it straight to your inbox so you can start training today.
Good luck out there — see you at the finish line in Boulder!
