The Williams Route 66 will celebrate its 20th year this November as thousands are set to take part in the marathon that runs ...

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 ...