Boulderthon hosts a 5K, 10K, half-marathon, full marathon and kid’s race on 19th Street and Pearl Street. The event was created in 2021 with just 1,600 runners and has grown to have an ...

The biggest race of Boulderthon, though, is the half marathon. If you’re still looking for a great fall half marathon in 2024, you can sign up with RW+ for a chance to receive guaranteed VIP ...

More than 10,000 runners will lace up their shoes and descend on Boulder for this year’s Boulderthon on Sunday. The event, which offers a kids’ run, a 5K, 10K, plus a half-and-full marathon ...

The Boulderthon (September 29), with its 26.2-mile race being named among the best fall marathons in the U.S. by Runner’s World, is one of the most picturesque races in Colorado.While it’s one ...