Never Summer 100k @ State Forest State Park, Walden, CO, United States on 25 July 2020

The Never Summer 100km will take place almost entirely within the boundaries of State Forest State Park and run between the Never Summer Mountains on the northern border of Rocky Mountain National Park (RMNP) and the Medicine Bow Mountains to the north of Cameron Pass. The first 20 miles of the race will offer a […]

Quad Rock 50/25m @ Lory State Park, Fort Collins, CO, United States on 09 May 2020

Welcome to the Quad Rock 25 & 50 mile trail race, an event put on by trail runners for trail runners. Taking place on the trails and hills west of Fort Collins in Lory State Park and Horsetooth Mountain Park, the Quad Rock 25/50 will take you on a tour of the Fort Collins skyline, […]

Resolution Run 5K @ Edora Pool Ice Center, Fort Collins, Colorado, United States on 31 December 2019

“Run out the old year, and welcome the new! One of Fort Collins’ oldest races, the Resolution Run, is back for its 35th year with new features and surprises. Get a head start on your New Years Resolution by enjoy a family-friendly, neighborhood streets 5K starting & finishing at Edora Pool Ice Center. Kids, strollers, […]

Horsetooth Half Marathon @ New Belgium Brewery, Fort Collins, CO, United States on 19 April 2020

Welcome to the 47th running of the Horsetooth Half Marathon. Your race will take you on a scenic point-to-point journey from Hughes Stadium, the former home of the CSU Rams, to the finish line party at New Belgium Brewery. On the way you’ll tackle the challenging hills of Centennial Drive along the shorelines of the […]

Lisa Nelson’s Mustang Stampede 5K Memorial Scholarship Run/Walk @ Ralston Valley High School, Arvada, CO, United States on 14 September 2019

Lisa Nelson’s Mustang Stampede 5K Memorial Scholarship Run/Walk in memory of Coach Lisa Nelson, a beloved faculty member of Ralston Valley High School. Lisa passed away from cervical cancer in March 2013.The purpose of this 5K Run/Walk is to unify the local community in commemoration of her life and raise funds for a college scholarship […]

2019 Allstate Hot Chocolate 15k/5k Denver @ Civic Center, Denver, CO, United States on 06 October 2019

Join the movement that’s taken over the racing world. Allstate Hot Chocolate 15k/5k is headed to Denver on October 6, 2019! Start and finish at Civic Center Park amongst Denver’s biggest chocolate aficionados. This year, train, race, and celebrate with us all the way to the finish line. We’re with you through the season.

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The Denver 5K – Sept 14th, 2019 @ Sloan Lake, 17th and Utica, Denver, Colorado, United States on 14 September 2019

Sloan’s Lake is the setting of The Denver 5K where runners test their skills on a flat and fast beautiful course in the shadow of Denver’s Skyline. Enjoy a post-race expo with a Live Band, Food Trucks, Puppy Adoption, Face Painting, Balloon Art, Food, and a Free Beer After-Party at Joyride Brewing. Each participant receives […]

Rocky Mountain Regionals Cyclocross Championships @ Vix Ranch Park – City of New Castle, New Castle, Colorado, United States on 07 December 2019

2019 Rocky Mountain Regionals Cyclocross Championships – Saturday and Sunday, Dec. 07 & 08, 2019 – Vix Ranch Park @ 627 N. Wildhorse Dr, New Castle, CO MAD Racing Colorado is bringing you the the 2019 Rocky Mountain Regionals Cyclocross Championships. Worthy cyclocross terrain offered by the Vix Ranch Park; your bike will thank you […]

Colorado Springs Marathon @ , Colorado Springs, CO, United States on 28 September 2019

The Colorado Springs Marathon Presented by Centura Orthopedics is a national running event that features a Full Marathon (BQ), Half Marathon, 5k and Kids K beginning and ending in downtown Colorado Springs. The course will showcase this beautiful city by taking runners on through America the Beautiful Park, Monument Valley Park, around Memorial Park, and […]

Spartan Colorado Rockies Kids Race 2019 @ Aspen Snowmass, Snowmass Village, Aspen, CO, United States on 03 August 2019

Kids Race: Our mission is to inspire children to develop a love for fitness at an early age. We provide safe, age appropriate obstacle course race venues to build participant confidence, while enjoying a thrilling outdoor activity. We encourage kids to jump, run, get muddy, help each other and have a good time, while conquering […]

Rugged Maniac 5k Obstacle Race, Denver – August 2019 @ Thunder Valley Motocross Park, Morrison, Colorado, United States on 10 August 2019

50% FESTIVAL + 50% MUD RUN = 100% AWESOME!

Here’s how it works:

THE FESTIVAL

The 5,000-person party starts at 8:30 a.m. with a DJ on the main stage, booths giving away free stuff, all kinds of interactive games (mechanical bulls, dance-offs, stein-hoisting, pie-eating…), and tasty food and beer to keep you fueled all day. […]

Run Like the Wind 5K, Walk Like the Breeze 2K & Dog Jog @ 14863 Colorado Highway 7, Allenspark, CO, United States on 24 August 2019

This is the 11th year of Run Like the Wind 5K and the second year for our Dog Jog. This year we’re adding Walk Like the Breeze 2K. This new walk is perfect for those wanting an easy stroll in the great outdoors and to join in all the race festivities.

Join us at 8,504 […]

Rugged Maniac 5k Obstacle Race – Denver, August 2019 @ Thunder Valley Motocross Park, 701 South Rooney Road, Morrison, CO, United States on 10 August 2019

50% FESTIVAL + 50% MUD RUN = 100% AWESOME!

Here’s how it works:

THE FESTIVAL

The 5,000-person party starts at 8:30 a.m. with a DJ on the main stage, booths giving away free stuff, all kinds of interactive games (mechanical bulls, dance-offs, stein-hoisting, pie-eating…), and tasty food and beer to keep you fueled all day. […]

Spartan Race Fort Carson – Colorado Springs Trail 21k and 10k 2019 @ Fort Carson Army Base, 2700 Wilderness Road, Fort Carson, CO, United States on 14 July 2019

Spartan Trail is a no-obstacles foot race through rugged wilderness, overseen by legendary race directors from the world of trail running. With a 10k (6.2 mile) race at all events and a Half Marathon (13.1 mile) at select locations, there’s a Spartan Trail for everyone.

Spartan Race Colorado Rockies Ultra, Beast and Sprint 2019 @ Aspen Snowmass, Snowmass Village, CO, United States on 03 August 2019

Spartan Ultra: 30 mi / 50 km, 60 Obstacles The Spartan Ultra delivers unique course elements and obstacles, in some of the world’s most challenging locations. It is the ultimate test of strength and perseverance. If you can complete this, you can do anything.

Spartan Beast: 13 mi / 21 km, 30 Obstacles Think you […]

Spartan Race Fort Carson – Colorado Springs Super and Sprint 2019 @ Fort Carson Army Base, Fort Carson, Colorado, United States on 13 July 2019

Spartan Super: 8 mi / 13 km, 25 Obstacles This true athletic test offers the ideal blend between distance and speed. Are you determined to push beyond excuses? You just might have the guts for a Spartan Super.

Spartan Sprint: 3 mi / 5 km, 20 Obstacles 3 miles that will change your life. The […]

2nd Annual Just Peachy Run Races (5k, 10k, and 1k Kids) @ Palisade Riverbend Park, Palisade, CO, United States on 17 August 2019

MAD Racing Colorado invites you to work up an appetite for the Palisade Peach Festival by running a fun cross-country style course right before the Palisade Peach Festival opens. There will be a water station half way through this 5k course. The 10k will complete the 5k loop twice. All courses consist 40% paved sidewalk […]

Rabbit Valley Half Marathon Mack, United States 2019 @ Rabbit Valley camping area, Mack, CO, United States on 11 May 2019

Take this amazing opportunity to challenge yourself to run the 13,1 miles on short steep climbs, rock gardens and sand straps Rabbit valley half marathon is taking place the 11th of may 2019 and is located at Rabbit Valley in Mack, United States. With a low chance of rain, the Rabbit Valley is known for […]

Long View Marathon & Half Marathon @ City Park, Fort Collins, Colorado, United States on 05 October 2019

Showcasing a unique city-to-city trail connection, the Long View Marathon and Half Marathon runs from Fort Collins to Loveland. Together, Gnar Runners and Sweetheart City Racing bring a unique collaboration to Colorado’s running scene in this one-of-a-kind race event.

Fall Equinox Marathon, Half Marathon & 5 Mile @ Poudre Canyon, Fort Collins, CO, United States on 22 September 2019

Fast & beautiful, a great point-to-point downhill half marathon for a new PR! Starting at the famed Mishawaka & run entirely in the Poudre River Canyon. Enjoy the beauty & downhill course along Colorado’s only wild & scenic river.

Spring Equinox Half Marathon & 4 MIle @ The Biergarten at Anheuser Busch, Fort Collins, CO, United States on 24 March 2019

Scenic country roads make for a great spring half marathon! Course is an out & back with a mix of paved & dirt roads rolling Northwest of the brewery. Celebrate the 1st day of Spring with an early season race!

Resolution Run 5K @ Edora Pool Ice Center, Fort Collins, CO, United States on 31 December 2018

Run out the old year, and welcome the new! One of Fort Collins’ oldest races, the Resolution Run, is back for its 34th year with a new host and new course.

Get a head start on your New Years Resolution by enjoy a family-friendly, neighborhood streets 5K starting & finishing at Edora Pool Ice Center […]

Resolution 5K @ Washington Park, Denver, Colorado, United States on 31 December 2018

Join your friends this New Year’s Eve at Washington Park for the​ 34th annual Resolution 5K. Registration is now open on www.active.com Noon start this year, perfect for getting ready for anything planned in the evening. The family-friendly Resolution 5K is proud to support Volunteers of America–Colorado Chapter. Same-day registration is at South High School […]

Mountain RATS @ Color Coffee Roasters, Eagle, Colorado, United States on 07 September 2019

Come celebrate fall in the mountains with a trail running challenge! An exciting day of festival fun and adventure on the trails near Eagle, Colorado. With the start/finish line right in the heart of Eagle’s new fall festival, Septemberfest, friends and family can enjoy themselves while you push yourself in the rugged mountain race. Afterwards, […]

Rabbit Valley Half Marathon @ Rabbit Valley Trailhead, Fruita, Colorado, United States on 11 May 2019

The Rabbit Valley Half Marathon is a fun, rugged, desert run as an out and back mostly on the Kokopelli Trail. Runners will enjoy 13.1 miles of gorgeous early season desert with short steep climbs, rock gardens and sand traps.