What better way to spend a fabulous day in Colorado than biking on scenic trails? Colorado State Parks offer miles upon miles of bike trails that accommodate every level of rider. From paved paths to rugged and challenging mountain trails, there is something for every biker.
Check out some of the best bicycle trails at Colorado State Parks:
Barr Lake State Park: Barr Lake features an 8.8-mile bike trail, allowing visitors to take in the scenery while circling the lake and crossing the dam. This trail is perfect for a family day activity!
Eldorado Canyon State Park: A treasure in Boulder's 
backyard Eldorado Canyon offers the more experienced mountain biker quite the ride. Gaining 800 vertical feet with tight switchbacks, the Rattlesnake Gulch Trail is sure to please. Cyclists looking for an easier ride should check out the Walker Ranch Loop at Crescent Meadows.
Chatfield State Park: With something for everyone, Chatfield offers 26 miles of bicycle trails, half of which are paved. Enjoy a leisurely ride with your family or challenge yourself with the moderate network of internal trails.
Enjoy more bike riding opportunities at these other Denver area state parks: Cherry Creek and Golden Gate Canyon.
Lory State Park: Whether you are young or old, a beginner or an advanced rider, Lory has it all when it comes to mountain biking. Aside from the miles of scenic trails throughout the park, Lory opened the Corral Center Mountain Bike Park in 2006, which offers 69,600 square feet of riding excitement!
St. Vrain State Park: Observe and enjoy nature to the fullest on St. Vrain's 3.5 miles of unpaved roads and trails suitable for leisurely bicycling.
Enjoy more bike riding opportunities at these other Northern Colorado area state parks: Boyd Lake, Eleven Mile, Jackson Lake and North Sterling.
Arkansas Headwaters Recreation Area: With stunning views of the Collegiate Peaks and Sangre de Cristo Mountains, AHRA offers a unique diversity of biking trails. The Collegiate Peaks Group Picnic Area is where bikers can catch the Midland Bike Trail, Barbara Whipple Trail and Four Mile systems, which offer miles of scenic routes for all skill levels.
Cheyenne Mountain State Park:Wedged along the foothills, Cheyenne Mountain's terrain is the perfect setting for bike trails. 
Ride through grass prairies, scrub oak woodlands and serene forests while exploring the 20 miles of trails. With so much to offer cyclists, Cheyenne Mountain has been the site of the Sand Creek International Classic Mountain Bike Race for the past three years.
Mueller State Park: Experienced mountain bikers can explore Mueller's 19 miles of trails designated for bicycles. Keep in mind that there are no easy trails; only moderate to steep gravel trails, so don't forget your helmet.
Enjoy more bike riding opportunities at these other southeastern area state parks: Lake Pueblo, Lathrop, San Luis and Trinidad Lake.
Mancos State Park: If you're looking for a mountain bike adventure in the Four Corners area, check out the single-use trails at Mancos. These trails also connect to countless U.S. Forest trails, as well as the Denver-to-Durango Colorado Trail for the dedicated cyclist.
Ridgway State Park: With spectacular views of the San Juan Mountains, Ridgway offers both paved and gravel trails that range from easy to strenuous. For bikers who want to explore outside the park, a paved trail runs from the Dallas Creek area to the town of Ridgway, a roughly four-mile ride.
Enjoy more bike riding opportunities at these other southwestern area state parks: Crawford and Navajo.
Highline Lake State Park: Highline Lake is well known in the mountain biking world for its selection of trails. 
Located on Colorado's Western Slope, this park offers a variety of trails for beginners to the experienced biker. For an easier ride, the Highline Lake Trail circles the reservoir and offers alternate paths that end with scenic views. For those looking for a challenge, the Fruita Trail may be the path for you. Highline Lake is also the location of the world-famous 18 Hours of Fruita endurance race. Be sure to pickup a trail map and explore the other exciting bike trails that are offered here!
Steamboat Lake State Park: Mountain biking is available on Steamboat Lake's more than seven miles of established trail. If that's not enough for you, there are also additional biking opportunities at the adjacent Routt National Forest.
Enjoy more bike riding opportunities at these other Western Colorado area state parks: James M. Robb—Colorado River, Stagecoach, State Forest, Sweitzer Lake, Sylvan Lake and Vega.