Castle Rock, Colorado (United States of America) - "July 4th Rock-It Run". A new way to start your July 4th holiday. Join us for the 2nd Annual Rock-It Ruk 5k, Half Marathon (with relay option), FREE 1k Little Rock-It Run (8 years and under), and FREE Let Freedom Rock Concert. Kick-start your July 4th with a new tradition and feel good about Changing Lives. We ve got the RED & WHITE, and all we need is YOU! www.runtochangelives.org/rock-it-run

Fairplay, Colorado (United States of America) - "World Championship Pack Burro Race". The first year of the World Championship Pack Burro Race in 1949 saw 21 entrants with only 8 finishing the race. These days there are nearly 100 racers and burros that take on this historic challenge. Some choose the "lower altitude" short course of approximately 15 miles while others take on the long course and attempt the grueling climb to the top of Mosquito Pass and back, 29+ miles and an elevation change of 3,232 feet! The racers start at 9,953 feet in Fairplay and hit the halfway point at the top of Mosquito Pass, elevation 13,185! www.burrodays.org/races/burro-race

Winter Park, Colorado (United States of America) - "The Elevation Everest Race". The Elevation Everest Race is an endurance event held at Winter Park Resort in Colorado, focusing on elevation gain rather than distance. The goal is to accumulate either half or the full elevation of Mt. Everest. Participants can race solo or form a relay team with friends to divide the total elevation gain. Athletes race up the mountain, ride the gondola down, and repeat until they summit. The Half Everest race involves 10 laps up the mountain, over 14,516 feet of elevation gain, 22 miles, and allows 17 hours to finish. Looking for an even bigger challenge? Take on the Full Everest—19 laps up the mountain, over 30,000 feet of elevation gain, 42 miles, and the same 17-hour time limit. Backed by industry-leading sponsors like Garmin, La Sportiva, Gorewear, and Runners Roost, Elevation Everest is one of Colorado's fastest-growing endurance races and was voted a top-two finalist for "Endurance Event of the Year" by the Colorado Event Alliance. http://go.evvnt.com/3013666-2?pid=6562

Boulder, Colorado (United States of America) - "Boulderthon: Boulder Marathon, Half Marathon, 10K, 5K". Colorado's Premier Fall Race Series: Run a 5k, 10k, Half, or Full, at the foothills of the Rockies, in the stunning running mecca of Boulder. Run the streets Olympians train on, then celebrate at our epic after-party downtown! Boulderthon is one of the top-rated marathons in the United States: Named #5 Best Half Marathon in the US by Active, as well as #1 Best in Colorado and #13 Most Beautiful Marathon in the World by HalfMarathons.Net, Boulderthon drew over 7,000 runners from all 50 States and 18 Countries in 2023, nearly tripling in registration, and selling out. Tucked into a picturesque valley below the iconic Flatirons, Boulder, Colorado sets the backdrop for the top-ranked, signature Boulder Marathon, Boulderthon. Boulder is a world-class destination offering 300 days of sunshine and endless recreation, shopping, dining, cultural and entertainment choices. It's no wonder National Geographic named Boulder the Happiest City in America. www.boulderthon.org

Golden, Colorado (United States of America) - "Mountain Madness Fall Frenzy Orienteering Trail Race". Teamwork, strategy, and adventure await in Mountain Madness, Colorado’s unique team orienteering trail race! In this all-terrain challenge, teams must rely on map and compass skills to navigate the rugged wilderness and collect as many checkpoints as possible before time runs out—no GPS allowed! There’s no set course, only the raw beauty of Colorado’s backcountry and the strategy your team brings to the race. Stay together, choose your route wisely, and decide whether to chase high-value checkpoints deep in the mountains or rack up points with closer, faster finds. The terrain is unpredictable, the clock is ticking, and teamwork is everything. Self-sufficiency is key. Your team must carry all necessary supplies, and adapt to changing conditions. Whether you’re seasoned orienteers or first-time adventurers, Mountain Madness will test your endurance, navigation, and ability to work as a single unit. Gentle Grizzly is a 3-hour course with 5 checkpoints. Although checkpoints are spread out, they are located close to the start. This is a good event to attempt if you are new to orienteering trail racing and/or would like an easier event to try. Savage Grizzly is a 5-hour course with 10 checkpoints. Checkpoints are spread out across the state park. This event is for those teams who want a proper orienteering trail race challenge. Does your team have what it takes? Grab your map, trust your instincts, and embrace the madness! www.runsignup.com/Race/CO/Golden/MountainMadnessFallFrenzyOrienteeringTrailRace?aflt_token=Nktw0AUB3nF4FPeh7Y7AWqQewFdw9sGt