Rules & Regulations

Rules and regulations are in place for the protection of wildlife, the natural environment and all users of open space. Rules and regulations may vary depending on the open space property.

• In an emergency such as a fire, injury or any situation requiring immediate attention, call 911
• For unlawful activity, call Sheriff dispatch at 303-441-4444

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Complete Listing

Resolution No. 2011-59 contains a complete listing of Boulder County Parks and Open Space rules and regulations.

Rules & Regulations Summary


  • With the exception of Hall Ranch, Heil Valley Ranch, Caribou Ranch and Dodd Lake, dogs are allowed on open space.
  • All pets must be on a leash and under the physical control of its owner or guardian at all times.
  • Dogs are allowed off-leash only at Reynolds Ranch and the West Twin Lakes Trail.
  • Any owner/guardian accompanying a dog in an off-leash area must have the ability to restrain his or her dog when requested by staff.
  • Please remember to pick up, carry out, and properly dispose of all dog excrement.


  • Obey all fishing regulations at the specific open space.
  • A valid Colorado fishing license is required for all persons 16 years of age or older whenever fishing in ponds, lakes, creeks and rivers.
  • Ice fishing is prohibited.
  • See Fishing on Open Space for more information.


  • Boating is only allowed at Lagerman Reservoir and Pella Crossing.
  • Sailboats and sailboards are prohibited on open space.
  • See the Boating Section for more information.


  • Swimming and wading are prohibited on open space.

Ice Skating

  • Ice skating is only allowed at Mud Lake.



  • Parking is free.
  • Open space is open from sunrise to sunset, unattended vehicles left after dark will be ticketed or towed.
  • Vehicles must be parked in designated areas only.
  • Only cars with a disabled license plate or placard may park in the disabled parking spaces.
  • Unauthorized motorized vehicles are prohibited beyond parking lots.
    • This includes cars, trucks, motorcycles, minibikes, snowmobiles, four-wheel drives, or any other motorized recreational vehicle.


  • Except for emergency landings, landing and taking off with any motorized aircraft is prohibited on open space.
    • This includes airplanes, helicopters, ultralights, gliders, sailplanes and hot air balloons.


  • Mountain biking is only allowed on officially designated trails. Bicycle riders must yield the right-of-way to other trail users.
  • Downhill riders must yield to uphill riders.



  • Horses are allowed on open space, however, they must be under physical control.
  • Equestrians are strongly encouraged to stay on designated trails.
  • Horses must be on a lead and may not be tied and left unattended.
  • All trail users must yield to equestrians.


  • Do not feed, disturb, molest, or kill wildlife.
  • Hunting and trapping are prohibited.
  • Relocating or releasing animals onto open space properties is prohibited.


  • Discharging or carrying firearms, crossbows, fireworks, explosives or projectile weapons of any kind are prohibited except as expressly mandated by Article 12 of Title 18 of the Colorado Revised Statutes, as amended.
    • This includes paintball, BB, pellet, air, blow guns, rockets, crossbows, longbows and slingshots ($300 fine).


  • Do not collect, remove, destroy or deface any natural or manmade object within any open space including trees, down timber, branches, shrubbery, plants, flowers, fences, signs, kiosks, restrooms, cultural resources or shelters.


  • State law prohibits the possession or consumption of any beverage having alcohol content greater than 3.2% in any public place.

Open Space Manipulation

  • Do not install or replace rock bolts, plant trees or other landscaping, or construct trails or other structures on open space.

Glass Containers

  • Outside of an enclosed vehicle, glass containers and bottles are prohibited on open space.


  • Do not build ground fires or collect firewood on open space ($300 fine). Fires are only allowed in grills and fireplaces provided at picnic shelters and picnic areas.


  • Group Use Permits are required for all groups larger than 25 people.
  • Commercial use of open space is prohibited.


  • It is prohibited to deposit any object or dispose of trash, garbage or hazardous material, or clean vehicles or livestock trailers on any open space property.
  • Leaving objects on open space for the purposes of geocaching is unlawful and considered littering unless the person placing or searching for the cache complies with all Geocaching Rules, Conditions and Registration.


  • Posting advertisements or brochures on open space, in the parking lot or on vehicles is prohibited.


  • Other prohibited activities include: polluting land, water or air; golfing, hang-gliding, paragliding, parapenting, parachuting, para-sailing, remote-controlled land, water or air devices, mountain skateboards, ski bikes, off-road roller blades and similar devices.
  • Special Use Permit are required for any activity that does not fall under the generally accepted definition of passive use, regardless of number of people. Examples of passive use are hiking, biking, birding, and fishing.

Users are responsible for knowing and obeying all Boulder County Parks and Open Space Regulations. Violations are punishable by fines of up to $300. Boating, where allowed, must be in compliance with all state laws.


Parks & Open Space
Bevin Carithers