Important Updates:

The city expands beta to preview its new website and gather feedback. | More Info


The City of Boulder welcomes your feedback. Use our Inquire Boulder customer service tool to tell us what’s on your mind.

  • OSMP Trails & Recreation
  • OSMP Visitor Info
  • OSMP Get Involved
  • OSMP Nature & Restoration
  • OSMP - About
  • OSMP Kids & Families
  • OSMP Plans & Reports
  • OSMP en Español

Dogs on OSMP

Dogs on OSMP

Open Space and Mountain Parks (OSMP) offers dog guardians and their dogs many opportunities to enjoy the nature that's right in our backyards. OSMP lands have approximately 155 miles of trails, almost 90 percent of which are open to dogs. It is your responsibility as a dog guardian to read and understand the regulations so that everyone can enjoy their visit to OSMP.

OSMP Alerts

Winter conditions 

Winter conditions exist across open space! 

  • Trails may be icy & slick. 
  • Wear appropriate gear, such as traction devices for your shoes/boots.
  • Do not walk on ice-covered lakes and ponds.


People enjoy open space for physical, emotional and mental health. Remember to always be courteous. Don't forget: 

  • Only recreate with household members.
  • Wear a face covering when passing others. 
  • Stay on trail/walk through mud. Avoid stepping on vegetation. 
  • Visit to see current trail closures, historical data that shows areas of high and low open space use and trails that are wider than 6 feet. See when trails are busiest through our Visitation Data Explorer.
  • Protect first responders. Know your limits and don’t take unnecessary risks.

Dog Regulations

Dog regulations vary on OSMP lands. In some areas, dogs must be leashed. In other areas, dogs may be allowed off-leash if they wear a voice and sight tag and are under voice and sight control. Dogs are prohibited on a few trails.

Voice and Sight Dog Tag Program

Open Space and Mountain Parks is one of few systems on the Colorado Front Range which allow dog guardians to walk dogs off-leash. This opportunity is possible only if dogs are responsibly controlled under voice and sight control and display a voice and sight dog tag. It is a tough standard for both dogs and guardians.

Keep Your Dog Safe

OSMP is home to wildlife that could kill or injure your dog. Coyotes can be especially dangerous to dogs -- never let your dog run with coyotes even if they seem to be playing. The easiest way to keep your dog safe from coyotes is to keep your dog on-leash.

Other animals that could pose a threat to your dog include black bears, mountain lions, porcupines, skunks and rattlesnakes. All of these animals are more likely to attack your dog if your dog is chasing them.

Summer Safety Tips for Recreating with Dogs pdf

Other safety tips:

  • Keep your dog from running in prairie dog colonies to prevent possible exposure to plague.
  • Make sure your dog gets enough water and rest stops. Hot temperatures and exercise can cause heat stroke.
  • Never leave your dog alone in a car during warm weather.
  • When rock climbing or bouldering, make sure you or someone in your party is with your dog.
  • Check yourself and your dog for ticks in the spring.
  • Make sure to vaccinate your dog for rabies to ensure the safety of you, your dog, and others on the trail.


What is voice and sight control?

Dogs are off-leash, but stay within your sight and under your control. This means that when you command your dog to come, it does so the first time. You must have a leash for each dog with you. Only two dogs may be off-leash at once (per person). Each dog must display a voice and sight dog tag. Everyone who walks the dog off-leash on OSMP land must be registered with the Voice and Sight Dog Tag Program

What is voice and sight control in the corridor?

Some trails require that visitors stay on the trail and also allow dogs to be managed under voice and sight control. The purpose for requiring people to stay on trail is to limit impacts to the area where the trail is located in sensitive resource and restoration areas.  On trails where dog guardians are required to stay on trail and dogs can be managed under voice and sight control, dogs are allowed no more than 20 feet away from the trail.

How can I find out which trails allow dogs?

Where should I train my dog in voice and sight control?

Public dog parks allow dogs to be off-leash even if they don't meet the voice and sight control standard.

What is the dog waste composting program?

OSMP is participating in a dog waste composting program at several trailheads and access points. Compostable bags and waste receptacles are located at several popular trailheads and access points:

  • Dry Creek Trailhead
  • Bobolink Trailhead
  • Mount Sanitas
  • Eagle Trailhead
  • South Teller Trailhead
  • Marshall Mesa Trailhead
  • South Mesa Trailhead
  • Sawhill Ponds Trailhead
  • Chautauqua at start of Bluebell Road
  • Wonderland Lake Trailhead
  • Four Pines Access
  • Shanahan - Lehigh Access
  • Wonderland - Utica Access
  • East Boulder Gunbarrel Access (Boulderado & Cambridge)
  • West South Boulder Creek Trailhead
  • North Teller Trailhead
  • Boulder Valley Ranch Trailhead
  • Cottonwood Trailhead
  • Eagle Trail - Access 1/2 mile N of Foothills Trailhead

Composting reduces the amount of dog waste going to landfills and helps transform that waste into a beneficial compost mixture. A local business is doing the composting for OSMP! Watch a video on how dog waste is turned into high quality potting soil.

Why is dog waste such a big deal?

Besides its bad smell, dog waste can pollute water sources and encourage noxious weeds to grow.

Waste left on the ground runs off untreated into storm drains and waterways. Bacteria in waterways increase the potential for serious disease. This is bad for fish too – bacteria that feed on dog waste deplete oxygen, and encourage algal blooms. This can limit sunlight and suffocate aquatic life.

Dog feces contain nitrogen which can cause significant chemical changes in soil composition. When left on the ground, nitrogen leaches into the soil. This can kill native plants and encourage noxious weed infestation.

Dogs also have a wide diversity of intestinal bacteria. These often times carry nasty parasites like heartworms, whipworms, hookworms, roundworms, tapeworms, parvovirus, giardia, salmonella and E. coli. Roundworm is one of the most common parasites found in dog waste. It can remain infectious in contaminated soil and water for years.

Be Doggone Good About Dog Poop

  • Always pack out your dog’s poop and dispose of it properly.
  • Carry extra poop bags with you at all times.
  • Compost your dog’s poop in OSMP dog waste receptacles.
  • Carry a sealable bag with you to cut down on the smell.