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 of the newest events in the U.S. (only now in its fourth year), it’s also one of the fastest growing, doubling in size every year since its inception. You’ll start and finish in the iconic running mecca of downtown Boulder, with stunning views of the Flatirons throughout the course.

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 How to Livestream the Western States 100 guaranteed VIP race entry, Races - Places Runner’s World, Not a member yet:

  • Official half marathon training plans, created by Runner’s World
  • to access the survey at the top of the page Runner’s World Runner’s World+ members
  • to access the survey at the top of the page
  • We may earn commission from links on this page, but we only recommend products we back Runner’s World Access to all stories
  • Access to all stories, curated training plans for any running goal, cutting-edge tools, and gear reviews on RunnersWorld.com
  • And with VIP entry to the Boulderthon Half, you’ll also receive

And with VIP entry to the Boulderthon Half, you’ll also receive:

  • Free post-race massage
  • VIP parking in the morning
  • Advertisement - Continue Reading Below
  • Unlimited VIP breakfast, including bagels, snacks, hot coffee & tea, and more
  • Unlimited hydration & coffee bar after you cross the finish line

    We’re looking for RW+ members with various running experiences who would like to race the Boulderthon Half and are ready to take on a 10-week training plan. We will provide the training plan and our editors will chime in on nutrition, workout, and recovery tips. We’ll help you run your most fun—and hopefully best—half marathon ever!

    All Runner’s World+ members to access the survey at the top of the page this survey by July 15 to tell us a little more about yourself and your running journey to be considered! (Make sure you’re signed in with your RW+ account DAA Industry Opt Out. Not a member yet? Sign up here!) We’re excited to hear from you!

    Hundreds of streaming video workouts on demand!