Always bring a face covering when leaving your home. Anyone over 12 years old is required to wear face coverings anytime they cannot maintain six feet of distance at OSMP trailheads and when passing others on trails. If visitors are at least 6 feet away from others, they do not need to wear a face covering over their nose and mouth. However, if visitors reach 6 feet distance to someone else on the trail, they should put the covering back over their nose and mouth. Learn more.
Limited parking on Flagstaff Mountain. Flagstaff Mountain continues to be busy on the weekends. Parking is extremely limited. For your safety & the safety of others, do not park along the side of the road. Illegally parked vehicles can be ticketed and towed. Consider visiting different locations. Plan your visits through OSMPTrails.org or download the Boulder AreaTrails App.
Siempre traigan un cobertor facial cuando salgan de su hogar. Cualquier persona mayor de 12 años requiere usar un cobertor facial cuando no pueda mantener una distancia de 6 pies (2m), ya sea en las entradas de los parques o cuando pasen a otros en el sendero. Si los visitantes están a más de 6 pies (2m) de otros, no necesitan usarlo para cubrirse la nariz y la boca. Sin embargo, si los visitantes se acercan a 6 pies (2m) o menos de distancia de alguien en el sendero, deben cubrirse la nariz y la boca.
Stay on trail and walk through mud. If needed, step off to maintain distance. Please avoid stepping on vegetation. If possible, step onto a rock or a bare spot to let others pass, then step back on the trail. Politely announce yourself if you need to pass others. Traveling off trail, whether hiking, running or biking, can permanently damage vegetation and widen trails. Learn more.
On the south side of Independence Road, 0.2 miles east of the Diagonal Highway.
Please check for Trail & Area Closures.
You are responsible for knowing and complying with all closures and OSMP rules & regulations.
Parking lot at the trailhead on Independence Road. The entrance on Jay Road is an access point with no parking.
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.
An RTD bus passes very close to this trailhead. Learn about Taking the Bus to OSMP.
Cottonwood Trail (1.2 mile) extends north and south from the parking lot. Southward it is hard surface, wheelchair accessible and heavily used by bicycle riders. The path follows the Four-mile Canyon Creek ditch and passes by Hayden Lake (**Please note that this is a private lake) as it heads southwestward to the 47th Street bikeway. North from the trailhead, the path is soft surface, open to bikes, and when dry appropriate to sport chairs. It passes through agricultural grazing lands and over Fourmile Creek to Jay Road where the trail ends.
This area is identified as being popular with people using wheelchairs. See the Accessible Trails Page for details.
No facilities available.
No picnic facilities.
Bicycles are allowed on this trail. Bicycles may be ridden only on those trails that are posted with the international bicycle symbol. Other bike trails on OSMP.
Learn about bringing your dog to OSMP. North of the trailhead 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. Dogs are not allowed west of the trail in the prairie dog preserve. South of the trailhead the trail enters the city limits where dogs are required to be on leash. Dog excrement removal is required by law.
Horses are allowed on all trails. On-trail riding is encouraged to protect rare plants and wildlife habitat. Learn more about riding your horse on OSMP.
Prairie dogs are protected on this site. You may observe brown plastic along the bottom of the fences. This is "prairie dog fencing" designed to keep the prairie dogs in the preserve.
- Historically an area of farming and cattle ranching. Cattle are still grazed on the property and utilized as a weed management tool.