Event details subject to change. Please confirm all information via event website.
RMRR Spring Marathon Training Series #2
Platte River Trailhead Park Colorado Blvd and E 88th Ave, ThorntonWeek of Events
Desert RATS Trail Running Festival
Desert RATS Trail Running Festival
Desert Rats Trail Running Festival by UTMB has four unique distances, three days of racing and indescribable views of the desert. There is something for every runner. Enjoy views of the Colorado River as you race through flowy singletrack, climb up the mesa, and take in the vastness of the desert.
Run the Ranch Trail Runs
Run the Ranch Trail Runs
For the 5th year running and benefiting the Heart J organization, we are bringing back an amazing and beautiful trail race to Loveland, CO. You will have 6 distances to choose from. Come run on beautiful trails on private land at Sylvan Dale Guest Ranch. The views alone are to die for! There are different […]
NoCo Urban Ultra & Relay
NoCo Urban Ultra & Relay
A collaboration event between run.Windsor and Breakaway Athletic Events celebrating the Poudre River Trail. This long-distance race takes you on a sprawling tour of Northern Colorado via the picturesque Poudre River Trail. You'll enjoy scenic views and local amenities through Fort Collins, Timnath, Windsor and Greeley. While ultra distances can be daunting, this race is an ideal option for […]
Sunday, April 5, 2026
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April 5, 2026 -Three Creeks Half Marathon
Three Creeks Half Marathon
Racing Underground brings you an amazing half marathon this spring! The Three Creeks Half Marathon features a half marathon course that is flat, fast and scenic! Travel on foot through some of the most beautiful parts of Cherry Creek State Park, with a total combined elevation gain of only 291 feet spread out over 13.1 […]
Monday, April 6, 2026
No events on this day.
Tuesday, April 7, 2026
No events on this day.
Wednesday, April 8, 2026
No events on this day.
Thursday, April 9, 2026
No events on this day.
Friday, April 10, 2026
No events on this day.
Saturday, April 11, 2026
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April 11, 2026 -Mountain Ridge Trail Race
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April 11, 2026 -RMRR Spring Marathon Training Series #2
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April 11, 2026 -Amasa Trail Race
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April 11, 2026 -Run Through the Decades
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April 11, 2026 -Dash for Detection 5K
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April 11, 2026 -CMRA Clear Creek 5K
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April 11, 2026 -Rockin’ on the River 5K
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April 11, 2026 -ASDAsh 5K to Beat Tooth Decay
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April 11, 2026 -Danico Brewing 5K
Mountain Ridge Trail Race
Mountain Ridge takes place near Highlands Ranch primarily on the Douglas County East-West Regional Trail. This gently rolling course will keep the Heart Rate pumping while offering some of the best views in the front range. The Mountain Ridge Trail Race will once again start and finish from Mountain Ridge Middle School, and offer 100% […]
RMRR Spring Marathon Training Series #2
These Marathon training races are geared towards people training for spring marathons. They are supported runs with aid stations and are timed and scored. There are both 10 mile and 20-mile distances for people who are training for either a half marathon or a full marathon. Come and join us for a fun, competitive training […]
Amasa Trail Race
Amasa Trail Race is a 25K, 15K, 10K through one of Moab's most prized trail systems. Run past petroglyphs, the famous whale rock, red rock, canyons, and the Colorado River, as you experience the desert in the spring time.
Run Through the Decades
Step back in time and hit the streets to the soundtrack of three iconic eras at Run Through the Decades—a race that celebrates the unforgettable music of the 60s, 70s, and 80s! Whether you love the soulful rhythms of the 60s, the funky grooves of the 70s, or the neon-charged energy of the 80s, this […]
Dash for Detection 5K
Be part of a movement at Denver's City Park for our 5K event dedicated to raising awareness about oral cancer. Oral cancer can affect any area of the mouth and is influenced by risk factors such as tobacco and heavy alcohol use, as well as HPV infection. Symptoms to watch for include non-healing sores, lumps, […]
CMRA Clear Creek 5K
This race will head west from Prospect Park on the Clear Creek trail on the north side of Clear Creek. There will be a turnaround and part way back there is a bridge crossing where runners will run on a dirt path on the south side of the creek. There will be another bridge crossing […]
Rockin’ on the River 5K
Dust off your well-loved t-shirts and show 'em off at the Rockin' on the River 5K! Pre and post-race music and entertainment for all. Take in the view along the beautiful South Platte River on the Mary Carter Greenway in Littleton.
ASDAsh 5K to Beat Tooth Decay
Join us for the University of Colorado School of Dental Medicine's 6th Annual ASDAsh 5K to Beat Tooth Decay! We are excited to share that our 5K course has been revamped this year to offer a fresh new route through campus. This year, we will be starting and ending at the LIBRARY COMMONS! Additionally, we're […]
Danico Brewing 5K
Join us for the Danico Brewing 5k, and great, local craft beer at Danico in northeast Denver on April 11, 2026 Join us for the Danico Brewing 5k on April 11, 2026, for a 5k fun run event that starts and ends at this awesome taproom in northeast Denver. Run, walk, jog - whatever goes! […]
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