Iron Horse Classic — Three days of bicycling events in Durango, featuring a 50-mile bike tour, road race, criterium, and mountain bike race. The bike ride to Silverton caps at 2,500 cyclists; registration opens Dec. 3, 2013. Dates: May 24-26, 2014.
Colorado San Juan Skyway — Bicyclists travel for 235 miles from inn-to-inn during the week at above 5,000 feet elevation. Starts and ends in Durango. Presented by Adventure Cycling Association. Dates: June 8-14, 2014.
The Denver Post 2014 Ride the Rockies — The challenging ride celebrates its 29th anniversary in 2014. Bicyclists will ride 473 miles and cross six mountain passes — Berthoud, Muddy, Rabbit Ears, Tennessee, Fremont and Loveland. Starts in Boulder, with overnights in Winter Park, Steamboat Springs, Avon, Breckenridge and ending in Golden. Lottery registration ends at 5 p.m. March 2. Dates: June 7-14, 2014.
The 2014 Bicycle Tour of Colorado — The 20th edition of this 7-day bicycle tour loop of Colorado starts in Gunnison with overnights in Montrose, Ouray, Durango, Pagosa Springs (two nights) and Creede before returning to Gunnison. 394 miles. Limited to 1,500 cyclists. Dates: June 21-28, 2014.
Colorado Rocky Mountain Bike Tour — This is the eighth year for this bike tour, which hits some of the most challenging climbs in the Rockies. The bike ride loop starts and ends in Colorado Springs, with overnight stops in Canon City, Salida, Crested Butte, Buena Vista (two nights), Woodland Park. Final day includes option to summit Pikes Peak. Total mileage is 460 miles. (Registration caps at 500.) Dates: August 3-9, 2014.
Pedal the Plains — A three-day loop bike ride that explores the flatness of eastern Colorado. Fifty to 70 miles per day, with a century option. Sponsored by the Denver Post, but certainly not to be confused with Ride the Rockies. with a century option one day. Dates: Sept. 19-21, 2014.
Also check out Bike the Byways – 25 scenic bicycle routes in Colorado for independent-minded bicyclists.