Boulder Valley Ranch Trailhead
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.
Proteja a las personas, quédese en casa. Si es indispensable salir, practique la recreación responsable. Mantenga 6 pies de distancia física, use cobertores de cara y evite viajes innecesarios. Las áreas de refugio y picnic están cerradas. Para más información.
One mile north of Boulder on Highway 36, then one mile east of Highway 36 on Longhorn Road (a dirt road). The turn-off from the highway onto Longhorn Road is marked with a sign for Boulder Valley Ranch Open Space.
Please check for Trail & Area Closures.
You are responsible for knowing and complying with all closures and OSMP rules & regulations.
Parking lot on south side of Longhorn Road.
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.
The Eagle (2.6 mile from Mesa Reservoir to Eagle Trailhead) and Sage Trails (1.8 mile ) form a loop between this trailhead and the Eagle Trailhead. Heading southward on the Sage Trail you can either take this loop or head westward on the Cobalt Trail below an old smelter of 1930s to 1940s vintage and connect to the Eagle Trail as it heads toward the Foothills Trailhead. Another option is to pass the Cobalt Trail (0.9 mile) and take the Eagle Trail as it turns up toward the Mesa Reservoir (the reservoir is sometimes dry). A loop hike is available in the Mesa Reservoir area by following the Hidden Valley (1.0 mile) and Mesa Reservoir Trails (0.8 mile).
This area is identified as being popular with people using wheelchairs. See the Accessible Trails Page for details.
Located at the trailhead.
No picnic facilities.
Bicycles are allowed on the Eagle and Sage Trails. 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. 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.
Allowed on most trails. Off-trail riding is discouraged to protect rare plants and wildlife habitat. Learn more about riding your horse on OSMP.
There is an abundance of raptors: eagles, northern harriers, red-tailed hawks may be observed. Mule deer and coyotes are frequently sighted. Many snakes can be found in this area including rattlesnakes and bull snakes.
Boulder Valley Ranch is home to a fragile plant community on the black "Shale Barren" soils. Bell's Twinpod is a very rare plant that is unique to shale soils of Front Range Colorado.
- Present working and historic ranch.
- Remnants of a smelter on the south side of Longhorn Road.
- The 1990 Olde Stage fire burned in this area.
- Silverlake Ditch fed Mesa Reservoir until abandoned. Mesa Reservoir is now dry.