Mount Sanitas Trailhead
This is a fiendish trail, despite the number of people who actually run laps on it. It is not only a great workout, but the views it offers of the Indian Peaks Wilderness to the west and the city of Boulder to the east ar... summitpost.org
Green Mountain Loop
Scenic, testing route starting from the Chautauqua trailhead. yourrunning.com
Coal Creek Regional Trail
This is a gentle trail that follows the coal creek from Superior to Louisville. There are a few shady places next to the creek to rest on the way. It is used for family biking and easy runs. localhikes.com
Sourdough Trail, Boulder, Colorado
An extremely popular trail, which has caused some erosion to occur. However, this trail is the perfect choice for a hot day due to its higher elevation and the fact that it is shaded by pine trees for the entire length of the... trails.com
Rock Creek Farm, Broomfield, Colorado
Walking Rock Creek Farm is like being in Colorado 150 years ago. This open space embodies the tranquility of the open prairie before settlement and urbanization. Rock Creek Farm lies at the easternmost edge of the Boulder Cou... trails.com
Lion Trail - Boulder, Colorado
1.5-mile up a switchback canyon trail alongside a splendidly noisy stream (depending on time of year). Sheltered route, so snow and ice persists making the descent dangerous. You will cross the creek on boulders many tim... yourrunning.com
Switzerland Trail
Great views of the Indian Peaks; good workout close to Boulder. Tread: 8.8 miles on dirt four-wheel-drive roads. trails.com
Foothills Trail Extension, Boulder, Colorado
This route provides an ideal introduction to trail running due to its ease and its relatively short distance. This is the perfect run for a beautiful Boulder morning due to its lack of tree cover. And because of its proximity... trails.com
Hogback Loop, Boulder, Colorado
This is a short, hard workout worthy of multiple laps. It is best done in the morning and in non-inclement weather as it is in a wide open area. There are some great peak views towards the northern end of the loop for you to ... trails.com
Glacier Lake Road, Boulder, Colorado
This route actually has the less glamorous name of Forest Road 120, so it is given the more scenic ?Glacier Lake? name, based on the lake hidden to the north of its western terminus. Since this is not a trail, and is an actua... trails.com
Eagle / Sage Loop, Boulder, Colorado
This trail run is an excellent opportunity to explore the beautiful wetlands areas around the Mesa Reservoir, which provide a lush habitat for an array of water and grassland birds. Grade: Exceptionally easy. Most of the rout... trails.com
Boulder Reservior
Whether you're out for a morning jog and desire sweet trails with a great view or you wanna slip into a bikini and bake in the Colorado sun, Boulder Reservoir is the perfect destination for you. Take a dip at the swim beach i... 10best.com
Standley Lake Regional Park (North), Westminster, Colorado
This lovely grassland area in the northwestern suburbs features sweeping views of the mountains and a unique bald eagle sanctuary, operated by Jefferson County Open Space, in the northwest corner of the park. Although there a... trails.com
Anne U. White Trail, Boulder, Colorado
This breathtakingly beautiful run is situated along Four Mile Creek. Although there are no views of the surrounding area, the towering canyon walls provide not only a cool and refreshing place to run, but a home to an abundan... trails.com
Frazer Meadow, Golden, Colorado
Only 30 miles from Denver, Golden Gate Canyon State Park offers 14,000 acres of conifer forest, rocky peaks, mountain splendor, and aspen-filled meadows. Several ponds offer good trout fishing. There are twelve trails in the ... trails.com
Betasso Perserve
Betasso is a quick smooth loop through forested hills, with plenty of tight turns and speedy downhill sections. The climbs and descents alternate enough to allow even a beginner to have a good time on this track. In som... singletracks.com
Pearl Street Pub And Cellar
The Pearl Street Pub and Cellar offers locals everything they could ever want in a dive bar metromix.com