Boulderthon 2024: The Boulder Marathon

A boutique marathon nestled in the foothills of the Rockies with stunning views throughout the course, Boulderthon offers a marathon, half marathon, plus an all-new, all-roads 10K, and 5K, as well as a Kids Run. With the goal of spreading the joy and power of running and creating a more inclusive community, Boulderthon caters to all ages and abilities, and gives you the chance to experience the magic of the running mecca of Boulder, plus run against the stunning backdrop of Colorado’s Flatiron mountains!

The marathon course starts in vibrant downtown Boulder, heading down Pearl Street and then into the city’s scenic backroads, past Valmont City Park. As the route winds out towards Valmont Reservoir, you’ll cross Boulder Creek and continue to Gunbarrel.

At the halfway mark, you’ll head through the town of Niwot, past the Mountain View Fire Station Cheer Station, and then head back in the direction of Gunbarrel. Running onto Jay Road, you’ll turn onto Independence Road, skirting the runways of Boulder Airport. The 22-mile checkpoint will keep you going, with a feed station and live music.

The final section of the course weaves past Hayden Reservoir, following Wonderland Creek into Valmont City Park. Hitting Mapleton Avenue, the finish line will be in sight as you head onto Mapleton Mile for a spectacular finish on historic Pearl Street Mall!

Half marathon runners will follow a similar route, beginning on Pearl Street and heading out towards Valmont Park. At Gunbarrel, runners will loop back down 63rd Street, heading onto Jay Road and past Boulder Airport. Half marathon runners will also get to experience the incredible finish-line on the bricks at the Pearl Steet Mall!

The 10kK is the perfect fall race, with a route taking in the streets of Downtown Boulder and some of the amazing views offered by the city. You’ll head along Pearl Street and then onto Pearl Parkway, where you’ll be spurred on by live music! Just after Valmont City Park, you’ll loop back towards downtown Boulder, following the same route and then turning onto Mapleton Avenue for a finish by historic Pearl Street Mall.

This brand new event for 2024 is an all-roads course, starting and finishing in downtown Boulder. The 5K is the flattest, fastest roads 5K prize purse and boasts the largest 5K prize purse in the nation at over $40,000.

Returning for its third year, the popular kids' run starts at 21st and Pearl and ends with an incredible finish on the historic Pearl Street Mall! Parents can run for free with their child, so this is the perfect introduction to running for your little ones.