North Teller Lake 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.
On the south side of Valmont between 75th and 95th Streets, about two miles east of 75th.
Please check for Trail & Area Closures.
You are responsible for knowing and complying with all closures and OSMP rules & regulations.
Ice on ponds and lakes
You can help to keep you and your pets safe by keeping them off OSMP's icy lakes. Many times, pets that fall into icy waters will be able to get out or self-rescue without assistance.
If it happens to you while visiting OSMP and your pet is unable to get out of the water, stay off the ice! Call 911 and Boulder Fire-Rescue will respond and rescue your pet!
Parking lot off Valmont on the south side.
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.
East Boulder Trail is sport chair accessible and meanders to the north past Teller Lake and through farmland utilized for crop production, cattle and horse grazing and bee keeping on its way to the South Teller Trailhead. The trail also extends west along Valmont Road for approximately 1/4 mile where it turns north, crossing Valmont Road, and enters the White Rocks Nature Preserve (**Please note that all visitors must stay on trail in the White Rocks Nature Preserve since it is a Habitat Conservation Area.) This trail is sport chair accessible from Valmont Road northward to Boulder Creek. This trail may be taken to the White Rocks Trailhead on 95th Street or to the Gunbarrel Farm Trailhead at the intersection of Boulderado and Cambridge Streets in the Heatherwood neighborhood.
This area is identified as being popular with people using wheelchairs. See the Accessible Trails Page for details.
Bicycles are allowed throughout the length of the East Boulder Trail. A bicycle rack is available at both the north and south trailheads of Teller Farm. Bicycles may be ridden only on those trails that are posted with the international bicycle symbol. Other bike trails on OSMP.
Visit the Fishing webpage for more information about fishing opportunities and regulations.
Fishing line and trash can kill wildlife. Please pick up all plastic trash you find! Discarded fishing line is especially dangerous to wildlife. Animals may eat or become entangled in litter, causing them to drown or starve to death.
Learn about bringing your dog to OSMP. Dogs are not allowed at Teller Lake No. 5 and must be leashed within 100 yards of the water at Teller Lake South. Dogs are not permitted north of Valmont Road in the White Rocks Nature Preserve.
All dogs must be leashed in the Trailhead Leash Area. Beyond 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. 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 a variety of waterfowl and fish at Teller Lake. Grass carp were introduced into the lake to control the growth of pond vegetation. State fishing regulations apply. All smallmouth and largemouth bass in possession must be 15 inches in length or longer. Raptors, coyote, fox and deer may also be observed in this area.
- Teller Farm is a historic and presently working farm. Irrigation and farming practices have changed since Open Space acquired the land.