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; register early. Dates: May 22-25, 2015.
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 7-13, 2015.
The Denver Post 2015 Ride the Rockies — The challenging ride celebrates its 30th anniversary in 2015. Starts in Grand Junction (with layover night) and ends in Westcliffe, with overnight stops in Hotchkiss, Gunnison, Crested Butte, Salida, and Canon City. Total mileage of 465 to 473 miles, and about 41,000 feet of elevation gain, depending on options. Lottery registration ends at 5 p.m. March 2. Dates: June 13-20, 2015.
The 2015 Bicycle Tour of Colorado — Now in its 21st year, this ride covers 400-some miles of Colorado terrain. Check website for route. Limited to 1,500 cyclists. Dates: June 21-27, 2015.
Colorado Rocky Mountain Bike Tour — For the 9th anniversary bike tour, the loop begins and ends in Gunnison. Overnights in Salida, Breckenridge, Leadville, Glenwood Springs, and Hotchkiss. Total mileage is 472 miles. (Registration caps at 500.) Dates: August 2-8, 2015.
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. 18-20, 2015.
Also check out Bike the Byways – 25 scenic bicycle routes in Colorado for independent-minded bicyclists.