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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

4SOH

Ft. Collins   The Four Seasons of Horsetooth Mountain Bike Challenge is a grass-roots un-event with no entry fees and no real start times and is ridden on the two solstices and two equinoxes in Horsetooth Mountain Park and Lory State Park. ByRead More

2017 Mavic Haute Route Rockies

CO

The inaugural 2017 Mavic Haute Route Rockies will bring seven timed and ranked stages to Colorado June 24-30. In addition to start and finish venues of Boulder and Colorado Springs, the event will visit Winter Park, Avon, Snowmass Village andRead More

Art by Bike Tours of Loveland

Chilson Recreation Center 700 E 4th St, Loveland

Loveland   Hop on your bike and join fellow cyclists on a slow-paced ride to experience Loveland's world-class public art collection! This two-part event features two unique loop-route tours led by a professional guide with At Your Pace Freestyle CyclingRead More

Lee Likes Bikes Level 1 MTB Skills Clinic

Valmont Bike Park Boulder

Valmont Bike Park, Boulder   Mountain biking is such a rad sport—and it’s about to get even radder. Do you know how it feels to rail a turn on skis or snowboard? Learn how to do that on your bike.Read More

$75

Lee Likes Bikes Level 1.5 MTB Skills Clinic

Sunset East Trails Erie

Sunset East Trails, Erie   Learn to flow down all sorts of trails — especially the sweet green, blue and black lines at Erie's Sunset East.   This is a Level 1.5 class: more advanced than a Level 1 butRead More

$99

Community Cycles Membership Party

Community Cycles 2805 Wilderness Place Suite 1000, Boulder

Boulder   Join us for the Annual Membership Party and Silent Auction on Saturday, June 24 from 6 to 9pm. Beer, Wine, Food, Bike Games and more! Membership assists Community Cycles in Making Bicycling Better in Boulder!  Membership discount onRead More

Parker Mainstreet Criterium

Photos - Brent Murphy Photo   ​This June get ready for a fast and flowing criterium race with one of the best finish lines in the sport!  This course takes center stage for its wide open roads, amazing smooth asphalt, andRead More

SMC – Breck Mtn Enduro

Breckenridge Ski Resort

Breckenridge   Enduro is best described as a mostly downhill-oriented cross country race and is the hottest format in mountain bike racing right now! Breckenridge Ski Resort and Maverick Sports Promotions are pleased to collaborate and bring this event toRead More

USAC Talent ID MTB Camp

Colorado Springs   The mission of USA Cycling's Regional Talent ID Camps is to Provide USA Cycling with Jr. Talent Evaluations while Offering Athletes a Pathway to Develop Their Cycling Ability. Our Talent ID Camps are the first step for youngRead More

Colorado Bike to Work Day

Colorado   National Bike Month is in May and includes an ever-expanding diversity of events in communities nationwide — but the biggest day of the month is Bike to Work Day. Most of the country celebrates Bike to Work Day inRead More

Battle @ Bellyache

Boneyard Trailhead, Eagle   Event details and registration here   Full series includes the following events May 31st - Eagle Ranch Classic XC June 14 - Berry Creek Bash June 28 - Battle @ Bellyache  July12 - Lost Lake LoopRead More

USA Cycling Amateur Road National Championships

USA Cycling Amateur Road National Championships p/b Papa John June 29- July 2 - Louisville, Ky. Registration Online Registration Opens April 26, 2017 at 11:00 a.m. ET Pro TTT Amateur TTT Junior Individual Races U23/Cat 1 Individual Races Pro IndividualRead More

Leadville Trail 100 MTB Camp

Leadville   Dramatically increase your chances of capturing that coveted LT100 MTB belt buckle by attending the 2017 Leadville Trail 100 MTB Training Camp. Camp participants will ride, dine and socialize with a host of experienced buckle-sporting guides, including six-timeRead More

Knobby Tread Dirt Prom

REI 1416 Platte St, Denver

Denver   Corsage? Check. Limo? Check. Padded shorts and tuxedo t-shirt? Check. Dig out your best prom and bike attire and help us ring in our favorite dirt-filled season at the REI Knobby Tread Dirt Prom. Join us for aRead More

Boulder Omnium Stage Race

Boulder   Friday Eldora Hill Climb Saturday Hygiene TT Sunday Boulder Road Race ​ Three days of action packed bike racing in a new time based omnium race format, but with the ability to also pick and choose to race one orRead More

VIDA MTB Clinic

Trestle Bike Park 85 Parsenn Rd, Winter Park

Trestle Park, Winter Park   We are excited to return to the home base for our largest event in the Rocky Mountains at Trestle Bike Park on July 1-2, 2017. Colorado’s Favorite Ski Resort is also a three-time first place winner in theRead More

DUST2: Urban Single Track

  Mark you calendars for the 2017 DUST2 Back Yard Mountain Bike Race Series line up! This fun race series has something to offer riders of every ability, so bring the whole family and all your friends! This year we haveRead More

Lee Likes Bikes Level 1 MTB Skills Clinic

Valmont Bike Park Boulder

Valmont Bike Park, Boulder   Mountain biking is such a rad sport—and it’s about to get even radder. Do you know how it feels to rail a turn on skis or snowboard? Learn how to do that on your bike.Read More

$75

Firecracker 50

Carter Park 300 High St, Breckenridge

Breckenridge   Greetings and welcome to the 2017 Firecracker 50, presented by Lincoln Park! This year’s race is on Tuesday, July 4th!  It’s always on the 4th…no matter what day of the week it falls! The Firecracker 50 is non-sanctioned.Read More

CANCELLED: Rocky Mountain Junior Cycling Challenge

June 21, 2017 From the Race Director: I am very sorry to announce that we are putting the Rocky Mountain Jr. Cycling Challenge on hold until 2018 for a myriad of reasons. Registration was about to open however personal circumstancesRead More

Tim Kalisch Memorial Grand Loop

CoorsTek Parking Lot 10th & Jackson, Golden

Date:  Saturday, July 8, 2017 Sign-in/Start Time: 2:15 am/3:00 am Start/End Location: Golden, Coors Tek Parking Lot Distance/climbing: 200 miles/15,500 feet Brief description:  The Tim Kalisch Memorial Grand Loop starts in Golden and passes through Boulder, Lyons, Estes Park, Granby,Read More

Tour de Ladies

Douglas County, Parker   Tour de Ladies is a fully supported, non-competitive, women-only cycling event through the rolling hills of Douglas County, south of Denver, starting in Parker.  With two route options, there is a ride for all cycling abilities.Read More

CANCELLED: Triple Bypass

Bergen Park Evergreen

    The Triple Bypass Bicycle Ride is recognized as one of the premier cycling events for those who DARE! Celebrating the 29th Anniversary of the Triple Bypass Bicycle Ride, the Triple offers two days of enjoying the beautiful sceneryRead More

Alison Dunlap MTB Level II Skills Clinic

Monument Valley Park 170 W Cache La Poudre St, Colorado Springs

Colorado Springs   Coed Clinic   The Level II clinics are for riders that are comfortable on singletrack and regularly ride mountain bikes off-road. A Level II rider likes technical trails but may not have the skills to feel comfortableRead More

WP Epic Singletrack: Race Randezvous

Hideaway Park 78927 U.S. 40, Winter Park

Winter Park   Epic Single Track Series Race 1: Saturday, June 10 - Granby Ranch XC Kick-Off Race 2: Saturday, June 24 - Super Loop Race 3: Saturday, July 8 - Race Rendezvous Race 4: Saturday, July 22 - ElkRead More

Leadville Silver Rush 50

Dutch Henry Hill U.S. 24 & McWethy Dr, Leadville

Leadville   Need a nice challenge? Then forget this one. It’s nasty. Cut the Blueprint for Athletes Leadville Trail 100 MTB in half, remove all the easy parts, throw in technical descents, burning lungs and wild animals and you’ll haveRead More

Lee Likes Bikes Level 2 MTB Skills Clinic

Valmont Bike Park Boulder

Valmont Bike Park, Boulder   Description Ride all sorts of terrain faster and smoother. Do you want to clean the rock garden at Hall Ranch (up and down)? Ready to boost jumps at Valmont and Trestle? This is the classRead More

$150

Lee Likes Bikes Level 1.5 MTB Skills Clinic

Sunset East Trails Erie

Sunset East Trails, Erie   Learn to flow down all sorts of trails — especially the sweet green, blue and black lines at Erie's Sunset East. This is a Level 1.5 class: more advanced than a Level 1 but lessRead More

$99

31st Annual Longmont Criterium

Photos - Brent Murphy Photo - SportifImages 2017 marks the 31sth Annual Longmont Criterium Classic. The 0.7 mile “L” shaped course is mostly flat and winds around shady, historic Thompson Park. Wide, smooth streets make this a fast and excitingRead More

Lee Likes Bikes Level 1 MTB Skills Clinic

Valmont Bike Park Boulder

Valmont Bike Park, Boulder   Mountain biking is such a rad sport—and it’s about to get even radder. Do you know how it feels to rail a turn on skis or snowboard? Learn how to do that on your bike.Read More

$75

Storm Peak Hill Climb

Mt Werner Steamboat Springs

Mt Werner, Steamboat Springs   Event details and registration here Series Schedule June 7th - Marabou XC June 21st - Emerald Envy XC July 12th - Bike Town Challenge, Storm Peak HC July 26th - Howelsen Howler August 16th SunshineRead More

Lost Lake Loop

Vail   Event details and registration here   Full series includes the following events May 31st - Eagle Ranch Classic XC June 14 - Berry Creek Bash June 28 - Battle @ Bellyache  July12 - Lost Lake Loop (adults only)Read More

TriVelo Youth MTB Camp

Snow Mountain Ranch 1101 County Road 53, Granby

Snow Mountain Ranch, Granby, CO   With a focus primarily on youth skills development and competition, TVS offers a Mountain Bike Camp aimed at providing athletes of various ages the opportunity to develop their cycling skills and enjoy  learning toRead More

Bob Cook Memorial Mt Evans Hill Climb

Clear Creek Middle School 320 Chicago Creek Rd, Idaho Springs

Idaho Springs   The Bob Cook Memorial Mt. Evans Hill climb is an iconic bicycle race that takes place on the highest paved road in the United States. Celebrating it’s 52nd year, it was run for the first time inRead More

Rocky Mountain Enduro Series Race #1

Angel Fire Angle Fire

Angle Fire, NM   Five Races, Three States, Great Racing! Kicking the RMES racing off, we will be at one of North America’s premier and legendary bike parks! This long standing venue will be offering the best of lift serviceRead More

Durango Dirty Century

Velorution Cycles 877 East Third Street, Durango

Durango     Event details and registration here   Part of the Colorado Endurance Series. Series event list here

DUST2: Cloman Park Revival

Mark you calendars for the 2017 DUST2 Back Yard Mountain Bike Race Series line up! This fun race series has something to offer riders of every ability, so bring the whole family and all your friends! This year we have addedRead More

Women’s Cycling Camp

Steamboat Springs   Ladies, this is your chance to get away from your busy lives by spending a few days in the mountains getting fit, soaking in the hot springs, learning key health & wellness strategies, and enjoying a mealRead More

CPFAA Games MTB Race

South Dinosaur Park Morrison

Morrison   Dakota Ridge-Red Rocks Loop can be viewed at this link. There is also a great video link of the course. Course is rated as a Double Diamond, technical single track with some suggested walkable areas. Sport class will doRead More

SMC: Pennsylvania Gulch Grind

Summit County   The Summit Mountain Challenge Mtn Bike Series was inherited in 2001 by Maverick Sports Promotions. Jeff had been timing alpine ski races for Team Breckenridge since 1996, raced bikes for a couple of years, and was looking forRead More

Tour de France Breakfast

Feedback Sports 600 Corporate Cir, Golden

Golden   Join us for a live viewing of Stage 18: the final battle between the climbers at the heart of one of the most spectacular locales of the Tour. The last ten km before the summit of the IzoardRead More

CX Strength and Conditioning

REVO Physiotherapy 3550 Frontier Ave, Boulder

Boulder   Cross is most definitely coming!.....Are you ready? Don't be left in the metaphoric dust secondary to ill preparation, or even worse, miss races with a nagging injury. Prepare yourself now to reap the benefits through the season.  Read More

Rocky Mounts Guest Bartender: Luis Benitez

RockyMounts 2845 29th St Unit B, Boulder

Boulder A casual event with Luis Benitez to celebrate the launch of the Colorado League's 8th season. Luis has been an integral part in orchestrating bringing Outdoor Retailer to Denver, article here. Lots of fun outdoor games and raffles going onRead More

Tooth or Consequences MTB Festival

Ft. Collins   We are excited to announce the second annual 2017 Tooth or Consequences Mountain Bike Festival held in beautiful Northern Colorado. Tooth or Consequences is a multi-day mountain bike extravaganza featuring a Friday evening Packet Pickup Party, anRead More