🏃 2021 Races, Runs, & Rides in Douglas County

Castle Rock, Highlands Ranch, Lone Tree, Parker, and Surrounding Areas

By Kyrie Collins, Highlands Ranch-Parker-Castle Rock-Lone Tree Publisher May 15, 2021

Know about a race in Douglas County not listed here? Email

Battle by the Brook Adventure Race
Saturday, September 25 at 8:00 AM
YMCA Camp Shady Brook, Deckers

  • Family Race Registration (shorter course): $50
  • Competitive Race Registration: $75
  • Each team will race in a variety of endurance disciplines, including orienteering/navigation,  cross-country running/hiking, mountain biking, and paddling
  • Enjoy an amazing day that ends with a post-race cookout and live music

LiveBig Run & Trail Festival
Saturday, October 2 at 7:30 AM
Philip S. Miller Park, Castle Rock

  • 5K, 10K, 50K, and Half Marathon Courses
  • Registration: $30-$95
  • All participants receive an event t-shirt and finisher's medal

Indian Creek Fifties
October 16, 2021
Indian Creek Campground, Sedalia

  • 15M Registration: $80 through July 31; $90 August 1-October 12
  • 55K Registration: $110 through July 31; $120 August 1-October 12
  • 50M Registration: $135 through July 31; $145 August 1-October 12

Backcountry Wilderness Half Marathon
Saturday, November 6 at 9:00 AM
Rocky Heights Middle School, Lone Tree

  • Registration starts at $60 (price increase on April 20)
  • Registration includes a long-sleeve shirt and post-race party with free pancakes and free beer (21+)

Turkey Day 5K
Thursday, November 25
Parker Recreation Center, Parker

  • More details coming soon

Highlands Ranch 5K/10K
Sunday, February 27, 2022
Highlands Heritage Regional Park, Highlands Ranch

  • 5K Run/Walk: $35 (price goes up after July 14, 2021)
  • 10K Run: $45 (price goes up after July 14, 2021_
  • Features a food drive for Blessings in a Backpack

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