Gregory Canyon Trailhead
Tell us what you think! Help us create more open space connections and preserve local agriculture
Please take a little time to share your ideas to help Boulder ensure an inclusive open space future, with welcoming outreach and volunteer programming, and to help the community preserve and enjoy Boulder’s agricultural lands. Please provide your thoughts by midnight, Dec. 18. Your input will help identify strategies for the Open Space and Mountain Parks (OSMP) Master Plan, which will guide the management of Boulder's open space over the next decade and beyond.
LOCATION
Turn south from Baseline Road onto Gregory Canyon Trailhead access road. The turnoff is west of the Chautauqua Meadow and east of where Baseline Road becomes Flagstaff Mountain Road and goes up Flagstaff Mountain.
Please check for Trail & Area Closures.
Or view the interactive trail map (includes trail closures) and the interactive wildlife closures map.
You are responsible for knowing and complying with all closures and OSMP rules & regulations.
Open Space and Mountain Parks Master Plan
Open Space and Mountain Parks has kicked off a long-term effort to establish a community-supported plan that will guide the management of the community’s open space over the next decade and beyond. Learn more about the OSMP Master Plan.
PARKING
Parking lot at trailhead and parking fee.
TRAILHEAD SAFETY
Please keep your car doors locked and your car windows rolled up at all times while leaving your vehicle parked at OSMP trailheads. Also consider leaving important valuables at home or take them with you while visiting open space. To report suspicious activity please call City of Boulder Dispatch 303-441-3333 or Boulder County Dispatch 303-441-4444. For crimes in progress, call 911 immediately.
TRAILS
View Gregory Canyon Area Trail Map 
Gregory Canyon (1.1 mi; 900 ft.) goes west past the junction of the Saddle Rock Trail, crosses a ridge with spectacular outcrops and views. It then climbs to a saddle and drops into a drainage to end at a dirt road leading up to Realization Point.
Saddle Rock (1.3 mi; 1,400 ft.) branches south off the Gregory Canyon Trail, crosses a bridge and climbs to the junction of the upper end of Amphitheater Trail. Climbs steeply to Saddle Rock, a spectacular overlook worth a detour. The trail continues past Saddle Rock to end at E.M. Greenman Trail.
Post-flood Update - Saddle Rock Trail now has a ladder: OSMP crews had to rebuild the trail in locations where floodwater removed large sections of earth. Department crews also installed a ladder in a steep, flood-damaged section of trail. Visitors need to exercise caution while on the ladder. OSMP also advises that visitors should not allow their dogs to attempt to negotiate the ladder.
Bluebell-Baird (0.7 mi; 340 ft.) branches southeast off the Amphitheater Trail and climbs a ridge, then follows the ridge south past the Chautauqua and Bluebell Mesa Trails to end at the Bluebell Road just behind the Bluebell Shelter.
Amphitheater (0.4 mi; 540 ft.) crosses a bridge and goes up a draw past the junction with Bluebell-Baird Trail. It then follows a draw steeply up past Gregory Amphitheater, a little bay in the rocks where you often see rock climbers. The trail ends at Saddle Rock Trail.
Flagstaff (moderate/strenuous) (1.5 mi; 1,120ft.) starts where Baseline Road turns into Flagstaff Road and the trail follows up to Panorama Point and up to Flagstaff Summit.
Crown Rock (0.5 mi; 400 ft.) starts from the Gregory Canyon Trail and goes north to join Flagstaff Road at the Crown Rocks bouldering area.
RESTROOMS
Restroom facilities at trailhead.
PICNIC FACILITIES
Picnic facilities.
BIKE REGULATIONS
Bicycles are not allowed on trails in this area.
DOG REGULATIONS
Gregory Canyon Area Dog Regulations Map
Learn about bringing your dog to OSMP. All dogs must be leashed in the Trailhead Leash Area. Beyond the trailhead, dog control requirements vary from trail to trail, so carefully watch for dog regulation signs at trailheads and trail intersections. On most OSMP trails in this area, dogs must be on a hand-held leash at all times unless they meet the voice and sight control standard and display a City of Boulder Voice and Sight tag. Dog excrement removal is required by law.
HORSE REGULATIONS
Horses are allowed on most trails. On-trail riding is encouraged to protect rare plants and wildlife habitat. Learn more about riding your horse on OSMP.
WILDLIFE
Black bears and mountain lions inhabit this area. Many other wildlife species are common including birds of prey, mule deer and coyotes. White-tailed and mule deer are common. Red-tailed hawks, foxes and coyotes are sometimes seen.