Roxborough Ultras

More races nearby

• Platte River Half-Marathon, Relay & 5k [platteriverhalf.com] [Register at runsignup.com]

  Sun, Apr 12, 2026 at 7:00 AM

  Description

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  Welcome to the Platte River Half Marathon, Relay & 5k race, one of the most exciting and popular races in the Denver Metro Area! This race is held annually in Littleton, CO. We’re thrilled to...

  Welcome to the Platte River Half Marathon, Relay & 5k race, one of the most exciting and popular races in the Denver Metro Area! This race is held annually in Littleton, CO. We’re thrilled to announce that registration for our upcoming 2026 event on Sunday, April 12th is open for the half-marathon and relay race. The race starts and finishes next to the beautiful Platte River Trail and adjacent to the popular Breckenridge Brewery campus. Join us for an epic post-race party at the Brewery with food, vendors, live music, and of course beer!

  Whether you’re an experienced runner looking to set a new PR, a newcomer looking to tackle your first half-marathon, or a team of runners wanting to run an exciting relay race, join us for a day of adrenaline-pumping running, scenic views, and all-around fun. What’s more, we donate a portion of the proceeds to Salute Colorado. Thank you for your support, and we can’t wait to see you at the finish line!

  Questions? Visit our race website here.

  Entry fees are non-refundable and non-transferable. There are no deferrals to future years.

  17.7 km
  6115 South Santa Fe Drive, Littleton, Colorado, 80120, United States
  OpenStreetMap Google Maps

  5k 13.1 Miles Marathon Relay Run Trail

• HRCA Highlands Point Circuit [runsignup.com]

  Wed, May 20, 2026 at 5:00 PM

  Description

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  The Highlands Ranch Mountain Bike (MTB) Series takes place on four Wednesdays throughout May-August. Each Wednesday night features a different route. All four races take place in our beautiful and...

  The Highlands Ranch Mountain Bike (MTB) Series takes place on four Wednesdays throughout May-August. Each Wednesday night features a different route. All four races take place in our beautiful and pristine Backcountry Wilderness Area, with the first three taking place on our Highlands Point Trail System and the fourth on our Wildcat Mountain Trail System.

  Mountain bike racers of all abilities are welcome! All categories are for men and women.

  The Highlands Point Circuit consists of two five-mile loops running clockwise for a total length of approximately 10 miles. Total ascent of 766 feet and a max elevation of 6,299 feet.

  Course map: https://www.strava.com/routes/17154969

  5:00 pm - Juniors 10-14 race 1 lap course

  6:00 pm - all other race classes race 2 lap course

  13.7 km
  2674 Pemberly Ave, Douglas County, Colorado, 80126, United States
  OpenStreetMap Google Maps

  Mountain Biking Run Trail

• Stepping Stone 5K [steppingstone5k.com] [Register at runsignup.com]

  Sat, Jun 13, 2026 at 8:30 AM

  Description

  Stepping Stone Support Center and Trailhead Community have come together to present this amazing event to benefit adults with developmental disabilities, raising both awareness and funds to give these participants a home of their own! Join us on June 13 at Clement Park for a 5K or a 2.5K Shortcut!

  20.1 km
  7306 W. Bowles Ave, Littleton, Colorado, 80123, United States
  OpenStreetMap Google Maps

  2.5k 5k Run Trail

• HRCA Rocky Gulch Circuit [runsignup.com]

  Wed, Jul 08, 2026 at 5:00 PM

  Description

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  The Highlands Ranch Mountain Bike (MTB) Series takes place on four Wednesdays throughout May-August. Each Wednesday night features a different route. All four races take place in our beautiful and...

  The Highlands Ranch Mountain Bike (MTB) Series takes place on four Wednesdays throughout May-August. Each Wednesday night features a different route. All four races take place in our beautiful and pristine Backcountry Wilderness Area, with the first three taking place on our Highlands Point Trail System and the fourth on our Wildcat Mountain Trail System.

  Mountain bike racers of all abilities are welcome! All categories are for men and women.

  This course consists of two five-mile loops running clockwise for a total length of 10 miles. Total ascent of 856 feet and a maximum elevation of 6,302 feet.

  Course map: https://www.strava.com/routes/17155094

  5:00 pm - Juniors 10-14 race 1 lap course

  6:00 pm - all other race classes race 2 lap course

  13.7 km
  2674 Pemberly Ave, Douglas County, Colorado, 80126, United States
  OpenStreetMap Google Maps

  Mountain Biking Run Trail

• Chase the Moon [finishers.com]

  Fri, Jul 10, 2026

  16.2 km
  Highlands Ranch, Colorado, United States
  OpenStreetMap Google Maps

  Run Trail