Sponsored by:

Have an event to List?
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

Elephant Rock

Douglas County Fairgrounds 500 Fairgrounds Rd, Castle Rock

Castle Rock   The Elephant Rock Cycling Festival began with the cycling boom in 1987. Our objective was - and remains - to offer both recreational and competitive cyclists the opportunity to participate in a challenging, meticulously organized and well-supportedRead More

Beti Bike Bash

Bear Creek Lake Park CO

Lakewood   Come and be a part of the largest women's mountain bike event in the world at the 10th Annual Beti Bike Bash! Whether you like to ride, race or just enjoy getting outside with your friends, the BetiRead More

Growdy Grinder

curt gowdy state park Laramie

Curt Gowdy State Park, WY In 2018, The annual Gowdy Grinder was offered to WyoX whereby the proceeds could be used to fund high school mountain bike racing (entry fees, yearly registration, etc).  This is why there’s been a websiteRead More

Salida Big Friggin Loop

Salida Salida

Salida   Please make sure to read all rules for this.  This is fully unsupported and you will need to be self-sufficient in order to complete this.  The rules are located HERE. Singletrack, high elevation, back country self supported endurance epic.Read More

Death Ride Tour X

Silverton, Telluride, Durango   It’s time to declare War On ALS and the DEATH RIDE Tour is going to bring the fight to this devastating disease. The DEATH RIDE Tour Inc., Charity Cycling Events is a registered 501c3 Non-Profit, TaxRead More

Pedaling 4 Parkinson’s

Sweetwater Park 8300-1/2 Sweet Water Rd, Lone Tree

Lone Tree   Pedaling 4 Parkinson’s draws hundreds each year to join the fight against Parkinson’s Disease. We will be starting at Sweetwater Park in Lone Tree, CO. With multiple distances to choose from, there is a route for participants of allRead More

RMRS – Pajarito

Los Alamos Los Alamos

Los Alamos, NM   This is a multi-discipline race series in Colorado and New Mexico, registration opens soon. There will be discounts for buying a season pass for the series, use the big REGISTER NOW link above to purchase a season pass.Read More

Lookout Mountain Hill Climb

lookout Mountain Nature Center 910 Colorow Rd, Golden

Golden   Photos by Brent Murphy: Lookout Mountain Hill Climb photos - Event details here

The Wellington-Roubaix

Old Colorado Brewing Company 8121 First St, Wellington

Wellington   The second gravel grinder in the Series, the Wellington-Roubaix is an epic challenge through Northern Colorado and the beautiful Pawnee National Grasslands with 3000  ft of climbing and miles of dirt roads -  a true gravel grinder!  Read More

The Eddy Rando

Creekside Bikes 9801 South Parker Road, Parker

Parker   Fifth Anniversary of Colorado's classic steel road bike event. 100 rider limit. Event includes 30 mile ride, lunch awards party and lots of vintage steel road bikes. Event details and registation here Event Flier   eddy rando 5Read More

Ride the Rockies Prologue

Crested Butte Crested Butte

Crested Butte   Enhance your Ride The Rockies’ experience by participating in the 10th annual Prologue. Ride along cycling celebrities while being treated to the finest accommodations accommodations on Mt. Crested Butte at The Lodge at Mountaineer Square. Register todayRead More

Ride the Rockies

Crested Butte Crested Butte

Crested Butte   Join us this year on the 34th Annual Ride The Rockies.  It is an epic adventure showcasing colorful Colorado on two wheels.  Enjoy the hospitality of Crested Butte, Gunnison, Buena Vista, Snowmass, Carbondale, Hotchkiss and Mt. CrestedRead More

Ridge at 38 Criterium and Brewfest

Wheat Ridge Cyclery 7085 West 38th Avenue, Wheat Ridge

Wheat Ridge Join us on Sunday, June 9 for the Criterium and Brewfest on Ridge at 38. This exciting and fun event has something for the entire family to enjoy. This year’s bike race will once again act as theRead More

Bikes Together Bike Camp Session 1

Odyssey School of Denver 6550 E 21st Ave, Denver

Denver   Bike Camp is the best thing that's ever happened! A two-week summer camp designed around all things bicycles, Bike Camp teaches your child to be a safe and responsible bike rider in an environment built on communication and teamwork.Read More

2019 Century Experience Ride

Florissant 11984 County Rd. 1, Florissant

Florissant   Choose from 100, 75 or 50 mile route options. There will be a King and Queen of the Mountain compititon on two climbs with a 7% grade. Four different age groups, under 30, 30 - 44, 45 -Read More

Moots Colorado Ranch Rally 2019

Moots Cycles 2545 Copper Ridge Drive, Steamboat Springs

Steamboat Springs   A gravel bike or Cyclocross bike fitted with 30-35mm tires.  Road & mountain bikes are welcome.  For road bikes, come fitted with 28mm minimum and mountain bikes a slick 1.25-1.5 inch tire would be best. It’s timeRead More

2019 Strider Cup Racing

Central Park Boulder

Boulder   We're back! That's right, we're returning to Boulder for the second race in the 2019 Strider Cup Racing series. We'll be back at Boulder Civic Area (Central Park), 1056 Boulder Canyon Dr. on June 15th, 2019. Strider CupRead More

25th Annual Starlight Spectacular

Garden of the Gods Visitor Center 1805 North 30th Street, Colorado Springs

Colorado Springs Come revel with us! Celebrate “25 years of wild style” on June 15th at the Starlight Spectacular night time bike ride in Colorado Springs, beginning and ending at the world-famous Garden of the Gods Park. Join 1,000 otherRead More

Laramie Mtb Series

Happy Jack Recreation Area 147-191 Happy Jack Road, Laramie

Happy Jack, WY   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 quality and competitive racing. This isRead More

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 quality and competitive racing. This is a great series forRead More

Robidoux Quick & Dirty

Five Rocks Amphitheater 200701 County Road P, Gering

Gering, Nebraska Just 3 hours north of Denver, this 75 mile gravel race held in Scotts Bluff County, Nebraska is run through the heart of the Wildcat Hills.  You can race it and gather a cash prize, or you canRead More

Community Cycles Annual Membership Party

It's time to thank members for their support and making Boulder a more bike-able city. Join us in celebration, door prizes, chill music, silent auction, Bike games including a Pie Joust, light food, wine & beer! Free to members - DiscountedRead More

GFNY Santa Fe

Santa Fe

Santa Fe   The global road cycling marathon series GFNY is coming to the Rockies with GFNY Santa Fe!  Come join riders from around the globe June 23, 2019 for either the 81 mile long course with 7,500' of climbingRead More

USAC Talent ID MTB Camp

Colorado College Colorado Springs

Colorado Springs   Event details and registration here   *To the best of our abilities, this information is correct. Please check the event website for the most accurate information.

Bikes Together Bike Camp Session 2

Odyssey School of Denver 6550 E 21st Ave, Denver

Denver   Bike Camp is the best thing that's ever happened! A two-week summer camp designed around all things bicycles, Bike Camp teaches your child to be a safe and responsible bike rider in an environment built on communication and teamwork.Read More

Laramie Mtb Series

Happy Jack Recreation Area 147-191 Happy Jack Road, Laramie

Happy Jack, WY   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 quality and competitive racing. This isRead More

Crested Butte Bike Week

Crested Butte Crested Butte

Crested Butte   THANKS TO EVERYONE WHO PARTICIPATED IN BIKE WEEK 2018, THE WORLD’S OLDEST BIKE FESTIVAL! Whether you’re looking to cruise down Kebler on a townie, mash singletrack miles on your XC bike, or experience the joy of liftRead More

Leadville Trail 100 MTB Camp of Champions

San Isabel National Forest Leadville

Leadville   Dramatically increase your chances of capturing that coveted LT100 MTB belt buckle by attending the 2019 Leadville Trail 100 MTB Training Camp. Camp participants will ride, dine and socialize with a host of experienced buckle-sporting guides, including: •Read More

Bike MS: Colorado

Front Range Community College Westminster 3645 W 112th Ave, Westminster

Westminster   An extraordinary experience marked by passion, inspiration, determination and fun. Feel the electricity at the starting line and the remarkable support throughout your journey as we unite in our mission to end MS.   Event details and registrationRead More

Lutsen Lutsen

Minnesota   The Lutsen 99er movement continues, high above the shores of beautiful Lake Superior. This 99-mile course (69-, 45- and 25-mile options also offered) takes advantage of the scenery and topography of Minnesota’s North Shore. We will start at Lutsen SkiRead More

Firecracker 50

breckenridge Breckenridge

Breckenridge   Greetings and welcome to the 2019 Firecracker 50, presented by Rocky Mountain Underground! This year’s race is on July 4th!  It’s always on the 4th…no matter what day of the week it falls! The Firecracker 50 is non-sanctioned. A licenseRead More

Sunshine Hill Climb

Boulder   Event details and registration here   *To the best of our abilities, this information is correct. Please check the event website for the most accurate information.

Silver Rush 50 MTB

Leadville Leadville

Leadville   50 miles that will put your skills and endurance to the test. Technical climbs and descents are met with the glorious mountain views of Leadville. 8,000 feet of elevation gain over these 50 miles presents an excellent testRead More

Bikes Together Bike Camp Session 3

Odyssey School of Denver 6550 E 21st Ave, Denver

Denver   Bike Camp is the best thing that's ever happened! A two-week summer camp designed around all things bicycles, Bike Camp teaches your child to be a safe and responsible bike rider in an environment built on communication and teamwork.Read More

Laramie Mtb Series

Happy Jack Recreation Area 147-191 Happy Jack Road, Laramie

Happy Jack, WY   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 quality and competitive racing. This isRead More

Triple Bypass

Evergreen   One July day in 1988, a group of avid cyclists decided that it would be fun and challenging to ride from Evergreen to Vail, Colorado. And so it was. Thirty-one years later and thousands of more friends besideRead More

Breck 100

Carter Park 300 High St, Breckenridge

Breckenridge   Welcome to Colorado’s premier off-road endurance race, the 15th annual Breckenridge 100. This incredible course climbs 13,000 feet over 92 miles.  Not quite ready for the Ultra?  Race the Marathon distance 100K, the XC distance 32 mile loop;Read More

Tahoe Trail MTB

Northstar California 5001 Northstar Dr, Truckee

Leadville   Ride rocky summits, breathtaking pine forests and beautiful Tahoe views in the unforgettable Tahoe Trail MTB, produced by Youphoria Productions. Race one 50K-loop or take on two for a chance to qualify for the Leadville Trail 100 MTB. All finishersRead More

Victor Roubaix

Victor Victor

Victor   The Victor-Roubaix is an epic gravel challenge in the heart of the Rockies with nearly 9000 ft of climbing and incredible views. Start and finish in downtown Victor! Event details and registration here   Series Events May 5Read More

Laramie Mtb Series

Happy Jack Recreation Area 147-191 Happy Jack Road, Laramie

Happy Jack, WY   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 quality and competitive racing. This isRead More

HR MTB Series

Highlands Ranch Highlands Ranch

Highlands Ranch   The Highlands Ranch Mountain Bike Series will take place in our beautiful and pristine Backcountry Wilderness Area in August this year. The Series will begin on July 17th and consist of four, Wednesday evening races starting atRead More

STEAMBOAT RAMBLE

The original Ramble, the Steamboat Ramble travels through the Roosevelt and Routt National Forests, starting in Fort Collins and ending in Steamboat Springs CO. On the route, we’ll travel through stunning landscapes, grand vistas, and desolate backdrops. We return toRead More

RMRS – Angel Fire

Angel Fire Angle Fire

Angel Fire, NM   This is a multi-discipline race series in Colorado and New Mexico, registration opens soon. There will be discounts for buying a season pass for the series, use the big REGISTER NOW link above to purchase a season pass.Read More

Tour de Steamboat

Little Toots Park Steamboat Springs

Steamboat Springs   The Tour de Steamboat is an annual bicycle event that brings together 1,200 cyclists for a one-day ride through beautiful Northwest Colorado. Names like Rabbit Ears Pass, Gore Pass, Yellow Jacket Pass, Stagecoach, Yampa and Oak CreekRead More

San Luis Valley Century

Cole Park Alamosa

Alamosa   Bike 2 Build, San Luis Valley Century We invite you to pedal 35 miles, a Metric Century or a 100 mile Century embraced by the dramatic 14,000 foot peaks of the Sangre de Cristo and San Juan mountains.Read More