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Whether a race, special group ride, training opportunity, or cycling-related community event, the 303 calendar showcases it all.  To have an event posted here please follow this link:  Event Policy Submission & Guidelines

Laramie Mountain Bike Series

The goal of the LMBS is to provide a low key and inexpensive evening of bike racing for all levels of mountain bikers. With a relaxed atmosphere, there is still

Firecracker 50

Greetings and welcome to the 2020 Firecracker 50, presented by Lincoln Park at the Wellington Neighborhood! This year’s race is on July 4th! It’s always on the 4th…no matter what

Eagle Revolution Enduro – Round 2

The day will start with a shuttle bump, then pedal transfer to the Stage 1, Start above 10,000 feet. From here its all downhill back to Eagle in four Stages.

Leadville Silver Rush 50

Need a nice challenge? Then forget this one. It’s nasty. Cut the Leadville Trail 100 MTB in half, remove all the easy parts, throw in technical descents, burning lungs and

Tour de Steamboat

The Tour de Steamboat is an annual bicycle event that brings together 1,000 cyclists for a one-day ride through beautiful Northwest Colorado. Names like Rabbit Ears Pass, Gore Pass, Yellow


Welcome to Colorado’s premier off-road endurance race, the 16th annual Breckenridge 100. If you’re not ready for the Ultra, then race the Marathon distance 100K, the XC 32, or enter

Bike2Build, San Luis Valley Century

Pedal 35, 65 or 100 miles embraced by the dramatic 14,000 peaks of the Sangre de Cristo and San Juan Mountains. Experience breathtaking Colorado and the great expanse of the

Ride & Revel

The Ride & Revel! cycling event began in historic downtown Greeley, Colorado, home to nationally recognized, award-winning craft breweries. At the finish, many enjoyed a prepared meal and a beer

719 Ride

Mile for mile the 719 Ride is one of the most challenging single day climbing events in Colorado.But it

Colorado Park to Park Challenge

100 Miles – 3 Cat 1 Climbs – 11,164′ Vertical GainThe Colorado Park 2 Park Challenge is a single-day Gran Fondo from Denver’s City Park to Winter Park Resort,

Telluride 100

Saturday, July 25th, 2020
START/FINISH AREA – Gondola Station in Town of Telluride (Oak St. & San Juan Ave.)

Start Time: 6:00AM

FIRST EXPECTED FINISHERS 9:30AM for the 50 mile racers & 2:00PM

Bob Cook Memorial Mt. Evans Hill Climb

The Bob Cook Memorial Mount Evans Hill Climb is presented by Team Evergreen Cycling, the largest and most charitable bike club in the state of Colorado. Through the proceeds of

FoCo Fondo

The FoCo Fondo is a daring gravel cycling adventure that starts and finishes at New Belgium Brewing in Fort Collins, Colorado. Choose family-friendly 12- or 25-mile routes and make those

FoCo Fondofest

The FoCo Fondofest, a gravel ride and festival, will return in 2020 on July 26. The fifth year event returns with four route options with approximate 12-, 25-, 50-, and 107-mile Bite the Bullet Challenge. The route finishes with aRead More

Colorado Tour de Moose Double Century

The RMCC will explore some new terrain in northern Colorado during the 2019 Colorado Tour de Moose. This challenging double century climbs into the heart of northern Colorado Rockies via

Copper Triangle

We start high in the Rocky Mountains and only go up from there. Based at Copper Mountain in the heart of the Rockies, the famous Copper Triangle is a Colorado

The Broadmoor Pikes Peak Cycling Hill Climb

Pikes Peak Colorado Springs

The Broadmoor Pikes Peak Cycling Hill Climb features a competitive race sanctioned by USA Cycling and a Gran Fondo non-competitive fun ride that give cyclists of all abilities a truly

Stonewall Century

The Stonewall Century is a challenging road bike ride along one of Colorado

Crooked Gravel

High-altitude views abound in every direction. Crisp mountain air exhilarates the senses. And swarms of riders fire each other up. And that’s before the ride even starts!
Both the 68- and

Sunrise to Sunset Winter Park

Winter Park Sunrise to Sunset capitalizes on two well-established strengths: the Sunrise to Sunset model and Winter Park’s deep mountain-bike roots. Luscious singletrack trails crisscross the mountains of Winter Park.

Steamboat Stinger

The Steamboat Stinger, now a Colorado classic, aims to provide a challenging backcountry race experience showcasing some of Steamboat Springs’ finest singletrack. The Steamboat Stinger is also a fundraiser for

New Castle Rides and Reggae Festival

VIX Ranch Park 627 N Wildhorse Dr, New Castle

The New Castle Rides and Reggae Festival is a celebration of all things trails, mountain biking, music and community. Rides and Reggae includes a Saturday full of fun including live

Leadville Trail 100 MTB

This is it, the race of all races. One hundred miles across the high-altitude, extreme terrain of the Colorado Rockies, this event was created for only the most determined athletes.

Cystic Fibrosis Cycle for Life

About CF Cycle for LifeColorado CF Cycle for Life is a fully-supported ride with route options for riders of all abilities. Riders will benefit from fully stocked rest stops every

SBT GRVL – Steamboat Gravel

**2020 Registration is Sold-Out**SBT GRVL is a new, world-class gravel race experience held on the greatest gravel roads on Earth in magnificent Steamboat Springs, CO. The unique combination of the

Breck Epic

Let me explain. No, there is too much. Let me sum up; The Breck Epic. Back to the beginning. When mountain biking was a about big rides with friends. About

Colorado Classic

The Colorado Classic® presented by VF Corporation will be back in Colorado on August 27-30, 2020! After a successful 2019 race, we will continue to provide unheralded financial support, global

Venus de Miles

Bohn Park 201 2nd Ave, Lyons

Each year, Venus de Miles brings more than a thousand women together for sisterhood, community, and a great time, all in support of Greenhouse Scholars. Venus de Miles Colorado returns

Wild Horse Gravel

De Beque, Co   Brand new for 2019, Wild Horse Gravel showcases the unique high desertscape of the Western Slope. Hosted on the luxury High Lonesome Ranch, riders will be treated to a country cook-out, campfire, cabins, camping – orRead More

Wild Horse Gravel

Wild Horse Gravel showcases the unique high desertscape of the Western Slope. Hosted on the luxury High Lonesome Ranch, riders will be treated to a country cook-out, campfire, cabins, camping

Powderhorn Revolution Enduro – Round 4

Powderhorn Ski Resort 48338 Powderhorn Rd, Mesa

Round 4, of Revolution Enduro series will be hosted at Powderhorn Mountain Resort located in the Grand Mesa National Forest approximately 3 hour 45 minutes from Denver. This

Strade Bianche Boulder

Inspired by two great cycling traditions – Strade Bianche and l’Eroica – Strade Bianche Boulder is a Gravel Gran Fondo that combines Tuscan food and wine with Italian camaraderie and

The Denver Post Pedal The Plains Bicycle Tour

Pedal The Plains (PTP) is a bicycle tour of Colorado, a signature event of The Denver Post Community Foundation and an initiative of The Denver Post and the State of

Boulder Octopus Ride

The Vail/Boulder Octopus is an endurance road bike event that tackles Eagle/Boulder County’s eight quintessential climbs. The ride alternates between Boulder and Vail biennially. It is very challenging but for

Tour de Cure Colorado

12M, 30M, 63M and 100M Cycling; 5K Run; 5K WalkRegistration fee: $10
Fundraising Minimum: $250 for cyclists; $100 for walkers and runners; $50 for 12 and under


Over 30 million

Tour de Vineyards

Do you like riding bikes and then drinking wine with friends? Then you will love Tour de Vineyards.
Celebrate the fall with a scenic tour of Colorado’s Wine Country on September

Pedal 4 Possible

Pedal 4 Possible is a charity ride benefiting Craig Hospital patients and programs.
P4P features courses for all skill levels (10K, 30K, 50K, 100K and 100 Mile).

While raising awareness and money

Monarch Crest Crank

Riverside Park Hartford

Fundraising mountain bike ride, held on an International Mountain Bike Association Epic route along the Continental Divide, and benefits The Alliance in Salida/Chaffee County. Details available at 

Golden GiddyUp

The Golden Giddyup is a community sponsored bike event and trail stewardship program held in Golden, Colorado on Jeffco Open Space trails. Founded after the 2013 floods wrecked towns and

Pikes Peak APEX

Pikes Peak Colorado Springs

The Pikes Peak APEX, presented by RockShox, is a unique 4-day mountain bike challenge on the slopes of Pikes Peak, America’s Mountain.The event features exhilarating, exceptionally crafted routes through dirt roads, jeep

The Crippler

Holy Cross Abbey 2951 East US Highway 50, Canon City

The Crippler is a Colorado-style gravel road race that will provide AMAZING scenery with panoramic views while simultaneously pushing your limits for climbing and descent.

Tour of the Moon

Two Rivers Convention Center 159 Main St, Grand Junction

The Tour of the Moon was made famous in the 1980’s Coors Classic and later in the cycling movie American Flyers. Its legacy continues as one of the premier road