News Flash

Parks and Recreation

Posted on: November 30, 2023

Winter Wildlife Closures on Mt. Jumbo, Mt. Dean Stone

  • Upper Mount Dean Stone Preserve trails are closed to dogs to protect wintering elk from December 1 to May 1, but some lower trails including the Barmeyer and Sousa remain open to dogs year-round.
  • Most of Mount Jumbo closes to all recreational use during winter to protect wintering elk, deer and other wildlife. The closure also helps protect recreationists and neighbors from avalanche danger on Jumbo's steeper slopes.
  • Jumbo's North Zone, including areas north of the Saddle Road, is closed from December 1 to May 1 or later. (Dependent on snowpack, weather, herd movement.)
  • Jumbo's South Zone, south of the Saddle Road, is closed from December 1 to March 15 or later. (Dependent on snowpack, weather, herd movement.)
  • Closure dates may vary due to weather conditions and wildlife protection requirements.
  • Trespassing during the wildlife closure is prohibited by law and violators may be fined up to $500.
  • Under certain conditions, Mount Jumbo can become an avalanche zone. Trespassers risk their own safety and the safety of others. Watch this site for avalanche updates.
  •  Please call 911 to report trespass violations.  If possible, please provide a description of the person and/or his vehicle and license plate number.
  • On Jumbo, the "L" and I-90 trails remain open all year, and dogs must be leashed during the winter closure.
  • Dogs must be under strict voice and sight control on Mount Jumbo and leashed where posted. Pet owners are asked to respect conservation lands, adjacent private property, other park visitors and wildlife by controlling their dogs at all times and removing their pet’s waste. Pet owners may not allow their dogs to chase, attack or harass wildlife or livestock on City open space. Free Mutt Mitts and loaner leashes are provided at trailheads.  

Closure Map (PDF)

Additional Info...
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