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Trail Running Calendar near Morrison 2026-2027

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Explore the top trail runs near Morrison for 2026-2027! We've gathered 36 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.

August 2026
Trail races at Philip S. Miller Park in Castle Rock CO with 50K, 25K, 10K and 5K on rolling Ridgeline trails, cup free aid stations and live split tracking.
Trail runs and family activities at Arapahoe County Fairgrounds with a dog friendly 5K, kids mile, pancakes, and fundraising for Back the Blue K-9 Force.
Free timed 5K in Lafayette at Waneka Lake with nearby parking; strollers allowed, dogs restricted, and concessions and T shirt sales support the Centaurus Cross Country Team.
September 2026
Join the community for a 5K run or walk on a brand new dirt course at the North Arvada Middle School Athletic Complex. Support local high school racers before taking on this off road route yourself.
A load bearing endurance event at Staunton State Park on September 5, 2026. Routes range from 6.5 to 21.5 miles with loads from 10 to 40 lb and proceeds benefit the Special Forces Foundation.
A longstanding Nederland, Colorado running event offering a 5K road run, a 10K trail, and a trail half marathon, with family-friendly features, on-leash dogs allowed in the 5K, and costume encouragement.
A high altitude trail race in Empire Colorado with 50K and 22K point to point dirt courses, sold out for 2026 with a 50K waitlist open.
A free supported training run in Castle Rock with 16-mile and 10-mile route options, community support, sponsors, and on-site vendors.
Trail fundraiser at North Table Mountain on September 19, 2026 offering 5 and 10 mile courses to support BeyondHome's work with families.
Community 5K, 1 mile fun run and a dog friendly 3.1 mile course on Second Creek Trail supporting Every Child Pediatrics in Commerce City on 09/19/2026.
A day of youth and adult cross country races in Aurora, Colorado on September 20, 2026, featuring grass courses with small undulations, a creek crossing, and bale jumps; distances run from 2k youth races up to a 5k open race.
October 2026
A multi-distance trail weekend at Bear Creek Lake Park offering 100K to 5K courses on mostly singletrack with aid stations, drop bags, pacer rules and live split tracking.
Experience the scenic HRCA Backcountry Wilderness Area with trail races for the whole family. Enjoy rolling hills and open views followed by a pancake breakfast and finisher medals for all participants in Littleton.
Castle Rock trail festival with a family adventure run and races from 5K to 50K on Philip S. Miller Park and Ridgeline Open Space.
An Oktoberfest themed run in Louisville Community Park with 5k, 10k, half marathon and a kids mile, featuring a traditional German beer mug, a large pretzel, a finisher medallion and an afternoon beer garden with live music.
OUTLAST Denver is a six hour trail challenge where runners complete a 5K every hour, earn patches or a medal for laps, and can place on a national leaderboard.
Multiple trail distances at Staunton State Park on October 10, 2026, from a steep 5K to a 50K ultramarathon, plus a 25K FishSlappers division that includes catching a trout; proceeds support conservation organizations.
Run the Rocks at Red Rocks Park in Morrison, CO offers a 5k and a 1.3-mile family course, raising funds for lung disease education, advocacy and research in Colorado.
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