Trail Running calendar near Loveland 2026-2027

A family-friendly *5K* mud run at Colorado National Speedway on June 20, 2026, with obstacles, waist-deep mud pits, slides, a pre-party and an after-party with music and food. Registration tiers include standard and VIP options.

A one day festival in Lyons Colorado combining gravel and road bike events, trail running races, live music, pool areas and camping. Distances include 100K and 50K gravel rides plus a 5 mile run and several relays.

Four Colorado mountain events include four half marathons and a 25K across June to September 2026, totaling 67.9 miles. The series is coordinated by HAL Sports with nonprofit organizers supporting local youth programs.

A community-focused trail festival in Gold Hill, Colorado, with 28K, 12K, 5K and Kids 1K races, a shuttle from Boulder, and proceeds supporting wildfire preparedness for the town.

Trail races at Lory State Park on June 27, 2026 featuring 10 mile, 5 mile and 5K courses with treetop views of Horsetooth Reservoir and aid stations using biodegradable cups and dog water bowls.

Chase the Moon is an overnight fixed time trail event in Highlands Ranch, Colorado with solo 12, 6 and 3 hour races, a 50K and three and five person relays. Runners complete marked loops on dirt trails with aid stations and drop bag support..

A backyard ultra on the paved Lake Estes trail where runners complete 4.252 mile loops each hour until one runner finishes a loop alone. The event records yards for DNFs and offers on-site aid and athlete village space.

Operation HAYSTACK is a half marathon in Nederland, Colorado on June 27, 2026. The course covers 13.1 miles with 4,226 ft of elevation gain and the listed entry price is $105 plus tax.

Alderfer 5K Trail Race at Alderfer Ranch in Evergreen Colorado is a 5 km trail event with shuttle service from Wulf Rec Center. The course is cup free with no aid stations, and water and refreshments are available at the venue.

A 5K run/walk in Winter Park, Colorado following the Fraser River Trail from Gondola Plaza to the Rendezvous Event Center, with an after party featuring refreshments, awards and prize giveaways.

Repeating 2 km out and back laps on the Thumb Open Space trail in Estes Park. Participants collect a poker chip at each turnaround and the most chips wins during a sunup to sundown timeframe; 35 spots and a $100 entry fee.

A community trail event at JCC Ranch Camp on Saturday July 18 offering 5k and 10k trail options, sliding scale entry, on course water and clinic support, plus post-race tie dye and craft activities for finishers.

High-altitude trail ultras in State Forest State Park offering 100 km and 60 km options across alpine ridges, varied technical terrain and staffed aid stations, with limited entries and significant elevation gain.

Held July 25, 2026 in Conifer, Colorado, the Elevation Run/Walk offers a 10K, a USATF certified 5K and a 2 mile fun run while raising funds for local school boosters and leading into the Elevation Celebration festival with music and vendors..

A single 200-mile loop around Summit County, Colorado on trails, 4WD roads and rec paths, with elevations above 9,000 ft and sections over 12,700 ft. The field is capped at 75 runners and includes 12 aid stations, four sleep stations, and l..

STRS #4 - Tom's Baby on July 29, 2026 takes place at Tom's Baby Trailhead in Breckenridge, CO, offering short and long course entries with adult, youth, and non-binary categories and published entry fees.

A point to point relay across Colorado, the Wild West Relay covers 200 miles and 36 legs from Fort Collins to Steamboat Springs over two mountain passes. Teams of various sizes can compete and each team carries a GPS tracker with app suppor..

A high-elevation trail race in Winter Park, Colorado on August 1, 2026 offering 50K, 21K and 10K courses over singletrack and dirt roads, with aid stations, age-group awards, and a town finish at Rendezvous Event Center.

Two Brothers Up and Down in Idaho Springs offers two uphill out and back races on mixed dirt and paved roads, with steep sections and an aid station on the 10k. Both races start and finish at Courtney Riley Cooper Park.

A four-race August trail series at Lory State Park in Fort Collins featuring 5k, 10k and 12k courses with chip timing, series points and end-of-series awards. Post-race pizza and beverages are provided.