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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

Firepower Cycling Camp

The Nature Place 2000 Old Stage Rd, Floirssant

Florissant   RyseOn and The Crippler are partnering to bring you the coolest event in cycling camp history. For one weekend, experience world-class coaching, all-inclusive amenities, and endless gravel roads. Base camp will be at The Nature Place near Florissant,Read More

Boulder Roubaix Road Race

Boulder   First held in 1990, Boulder Roubaix Road Race is the most popular and largest attended one day road race in Colorado. 32 different categories to choose from. From 1st timer to Pros. An 18.7 miles (30k) loop withRead More

Karen Hornbostel Memorial Time Trial Series

Cherry Creek State Park 4201 S. Parker Road, Aurora

Aurora   The 2019 Series consists of seven (7) individual time trials on consecutive Wednesday evenings.   Event details and registration here

Austin Rattler MTB

Reveille Peak Ranch TX

Reveille Peak Ranch, Texas   Saddle up for a Texas mountain biking favorite at the Austin Rattler MTB, produced by Youphoria Productions. Our 33k loop course offers plenty of fun in one lap alone, but those that ride 100k willRead More

Karen Hornbostel Memorial Time Trial Series

Cherry Creek State Park 4201 S. Parker Road, Aurora

Aurora   The 2019 Series consists of seven (7) individual time trials on consecutive Wednesday evenings.   Event details and registration here

East Side Epic

Cycles of Life Bicycles 309 Harrison Ave, Leadville

Leadville   These unique and exciting races occur throughout the winter in and around Leadville. Utilizing groomed nordic ski trails, groomed singletrack, and snowmobile trails, these races are a great way to keep riding and racing during the off-season. ThreeRead More

Karen Hornbostel Memorial Time Trial Series

Cherry Creek State Park 4201 S. Parker Road, Aurora

Aurora   The 2019 Series consists of seven (7) individual time trials on consecutive Wednesday evenings.   Event details and registration here

Koppenberg Road Race

The infamous Koppenberg Race, featuring the climb (17% grade), is the queen of the spring time cycling events in Colorado. This rustic setting sits next to, and incorporates parts of the Morgul Bismark Course. Boulder's Spring Classic is set toRead More

Karen Hornbostel Memorial Time Trial Series

Cherry Creek State Park 4201 S. Parker Road, Aurora

Aurora   The 2019 Series consists of seven (7) individual time trials on consecutive Wednesday evenings.   Event details and registration here

Bikerpelli Kokopelli Trail

Fruita   WHAT IS BIKERPELLI? The largest, most peic multi-day MTB event on the Kokopelli Trail. We host two fully supported trips in May for 3 days and nights and an average of 150 miles of serious trail time. You'llRead More

24th Annual Fruita Fat Tire Festival

Fruita

Fruita   Join us on May 3-5, 2019 as we celebrate our 24th year of this Colorado Mountain Bike tradition; the US Bank Fruita Fat Tire Festival presented by the City of Fruita. Meet MTB friends from around the worldRead More

50k & 100k Encierro Velo

Monument

Monument   Ready to test your courage? Or just looking for a adrenaline rush at the start of a awesome season ? Then Encierro Velo is your spring event. It will wake you up from your winter slumber! Google EncierroRead More

Ridgeline Rampage

Phillip South Miller Park 1375 W Plum Creek Parkway, Castle Rock

Castle Rock   Come out for the 10th annual spring fling on the grassy lawn at the Phillip S. Miller Amphitheater. Brink your blanket, spread out on the lawn and cheer on the racers. This ~12 mile circuit includes aRead More

May the Fourth Be With You Kids’ Bike Rodeo

Longmont   Kick off the season right with a skills course and first dibs on the new bike map.  A fun family-friendly bike event to get the season going.  We may be looking for best Star Wars themed costumes too.Read More

Fountain Roubaix

City Hall 116 S Main St, Fountain

Fountain   Starting & finishing in downtown Fountain, CO, the Fountain-Roubaix is the first event on our inaugural Tour of Colorado Series.  Evoking it's namesake, the infamous Paris-Roubaix, the course has more than 40 miles of El Paso County, ColoradoRead More

Cinco de Grindo

Kettle & Spoke Brewery 2500 47th St #12, Boulder

Boulder   100km-Climbing-Dirt-Gravel-Singletrack-Checkpoints-Lucha Libre ¡Dios Mio! Cinco de Grindo returns for a day on the backcountry roads and trails of Boulder County. Mas Informaciòn: giddyupboulder.blogspot.com

Bike to School Day

The first-ever National Bike to School Day took place on May 9, 2012, in coordination with the League of American Bicyclists' National Bike Month. Almost 1,000 local events in 49 states and the District of Columbia joined to gather toRead More

Bikerpelli Kokopelli Trail

Fruita   WHAT IS BIKERPELLI? The largest, most peic multi-day MTB event on the Kokopelli Trail. We host two fully supported trips in May for 3 days and nights and an average of 150 miles of serious trail time. You'llRead More

Desert RATS MTB Classic

Fruita On the western slope of Colorado, the famous Kokopelli Trail winds its way through sagebrush, ledgy slickrock, winding double track, sandy washes, fast jeep trails and crosses the state line toward Moab, Utah. This trail is the site ofRead More

Colorado Junior Cup

BOERA 599 Rosalie Road, Bailey

Platte Canyon School District   Colorado Junior Cup (CJC) was created to provide more racing opportunities to our juniors. It is our focus to create an environment that is competitive, but more importantly fun and exciting. Ultimately the goal isRead More

USA Cycling Marathon Mountain Bike National Championships

Palo Duro Canyon, TX Palo Duro Canyon

Palo Duro Canyon, TX   Online registraion for the 2019 Cycling Marathon Mountain Bike National Championship will open on March 14th. More information will be posted as it is finalized.   Event details and registration here

12 Hours of Mesa Verde

Cortez   12 Hours of Mesa Verde is a premier cycling event organized by volunteers dedicated to improving the lives of youth in Southwest Colorado. The 12 Hours of Mesa Verde began as "Ride the Lightning" in 2003, but hasRead More

Triple C Bike Ride

Broomfield   The Triple C Bike Ride is an early season ride on the front range of Colorado, starting in Broomfield, going north to Johnstown and back to Broomfield for an end-of-ride celebration. All proceeds from the ride benefit theRead More

Bike Night

Roosevelt Park 700 Longs Peak Ave, Longmont

Longmont   The original family-friendly cruiser night is back for another year, beginning mid May.  Meet others from all over on this slow ride through Old Town Longmont.  All abilities welcome. Every Wednesday evening, 6:30PM Roosevelt Park at the flagpoles.Read More

The Grand Junction Off-Road

Grand Junction Grand Junction

Grand Junction   All participants will climb their way out of downtown Grand Junction onto the Uncompahgre Plateau, while connecting some of the area's favorite technically challenging single track, double track, gravel toads and the occasional paved segment in theRead More

Pony Xpress Gravel 160

Trinidad CO

Trinidad 160K/70K gravel grinder   Come discover the challenge’s Pony Express riders faced in the 1860’s. These earliest American racers speed across remote, desolate regions of America. They had to combine speed, endurance, and mental toughness just to stay alive.Read More

Superior Morgul

Superior   Two of the most iconic courses on back to back days, right in the heart of Boulder County! On Saturday the action kicks off with the eight mile time trial event down Marshall Rd & Cherryvale, with theRead More

25th Annual Ride for the Pass

Aspen CO

Aspen   The Ride for the Pass is a fundraiser for the Independence Pass Foundation, whose mission is to restore and protect the ecological, historical, and aesthetic integrity of Independence Pass, a magnificent alpine landscape east of Aspen. The RideRead More

Battle the Bear

Bear Creek Lake Park Morrison

Lakewood   Race #2 in The Series. Distances for all abilities and ages, including a new 3-person Relay team discipline.  The intimate venue and Pit Zone offers a fantastic setting for hot racing action and spectating.  There will be a sponsorRead More

Santa Fe Century

Santa Fe

Santa Fe, NM   Miles of history pass under your wheels as you bicycle down the ancient Turquoise Trail, onwards through the Galisteo Basin to the old village of Galisteo, and back into scenic Santa Fe. The Santa Fe CenturyRead More

The Original Growler

Gunnison CO

Gunnison   Event details and registration here

BME Santa Fe

Glorieta Camps 11 NM-50, Glorieta

Santa Fe, NM   The Big Mountain Enduro 2019 season opener will kick off in Santa Fe, N with a two-day backcountry race entailing upwards of 8'000 feet of long rocky descents. Expect the raw terrain this event is knownRead More

Eastside Bike Night

Rough & Ready Park 301 E. 21st St, Longmont

Longmont   Cruise around northeast Longmont on Monday nights with Damian at 7PM.  Also a fun slow ride, also open to all!  Meets at Rough & Ready Park   Event details here

Eagle Outside Festival

Eagle Eagle

Eagle   Mark you calendars for May 31-June 2, 2019. The Eagle Outside Festival and the Bonfire Block Party are back. Tickets are already on sale for the Bonfire Block Party now ans we will have vendor announcements for EagleRead More

Dirty Kanza

Emporia Granada Theater 807 Commercial St., Emporia

Emporia, KS   Dirty Kanza Promotions was founded in 2006 by Jim Cummins, with the assistance of fellow cycling enthusiast Joel Dyke. At that time, gravel grinding was just beginning to catch the interest of the endurance cycling community. However,Read More

ERock Sunrise to Sunset MTB Race

Phillip South Miller Park 1375 W Plum Creek Parkway, Castle Rock

Castle Rock   Sunrise to Sunset Elephant Rock began as a 24-hour race back in the day. We've since decided that 12 hours is plenty! The course is designed to be fun and approachable. If you aren't a highly technicalRead More

21st Annual Buena Vista Bike Fest

McPhelemy Park Buena Vista

Buena Vista   Early registration ends March 22 One of the most beautiful rides in the state, with four route options (century, metric, half century and 35 miles). You will take in the outstanding views of Colorado's highest mountain peaksRead More

Grand Enduro

Grand Junction   The Grand Enduro will challenge you on three demanding stages in and around Grand Junction's Lunch Loops trail system. For those unfamiliar, the nature of these trails is very technical and require expert handling skills as wellRead More

Little Bellas Camp

Bear Creek Lake Park Morrison

Lakewood   The Little Bellas is a mountain bike organization whose goal is to help young women realize their potential through cycling. We aim to create a community that will empower girls through the sport, emphasize the importance of goal-setting,Read More

Tour de Victory

The Tour de Victory is a fundraising event benefiting the Davis Phinney Foundation for Parkinson's. Join us in our own backyard to help people with Parkinson’s to live well today!

peach bowl park 571 W 5th St #1, Palisade

Palisade   Gran Fondo loosely translated means ‘big’ or ‘great ride’. The Palisade Gran Fondo is a fully supported, road cycling event on rolling terrain through picturesque orchards and vineyards of Western Colorado. The Palisade Gran Fondo is a fully supported, timed road cyclingRead More

Burning Can RAD track/Beer relay/Jeff Lenosky

RAD Track, a fast-paced, bike obstacle race, will debut at the 2019 Burning Can Fest at the Lyons Outdoor Games on June 1st. This Burning Can original, inspired by the 80’s BM X bike movie, RAD, is a bike competitionRead More