Twin Lakes

This open space is a haven for wetland wildlife, a hidden gem in the heart of Gunbarrel area. Whether spending a lazy afternoon fishing or having an invigorating morning jog, community enjoyment runs high here.


East Twin Lakes Trail

0.7 miles
Dogs Allowed Bikes Allowed Hiking Allowed Horses Allowed
Dogs must be on leash

West Twin Lakes Trail

0.7 miles
Dogs Allowed Bikes Allowed Hiking Allowed Horses Allowed
Dogs off leash allowed

Picnic Areas

Twin Lakes
  • None


  • None


  • On-street parking only


  • Fishing is allowed
  • Boating is not allowed

Keep in Mind

  • Dogs must be on leash everywhere except on the West Lake Trail
  • Wading and swimming are not allowed
  • Hiking, horseback riding, bicycling, and dog walking are permitted


Management Plan

Tree Removal

The Colorado Division of Water Resources required the removal of smaller trees from the east lake dam to ensure the safety of the dam and to avoid consequences of a breach. Trees will be removed by Boulder and Left Hand Ditch Company since they are the operator of the dam and the associated infrastructure. Boulder County does not manage the dam or the water in the lakes.

Plants & Animals

Wetland habitats, nestled within the surrounding Great Plains, support aquatic plant and animal life and serve to lure in large numbers of migrating bird species. With grasses, wildflowers and trees surrounding the wetlands, these areas are biologically diverse both in and out of the water.


  • Coyote
  • Eastern cottontail
  • Fox squirrel
  • Little brown bat
  • Raccoon
  • Red fox
  • Striped skunk


  • American avocet
  • American coot
  • American crow
  • American goldfinch
  • American kestrel
  • American robin
  • American widgeon
  • Belted kingfisher
  • Canada goose
  • Common grackle
  • Common raven
  • Downy woodpecker
  • Black-billed magpie
  • Black-capped chickadee
  • Bullock's Oriole
  • Double-crested cormorant
  • Great blue heron
  • Great Horned Owl
  • Killdeer
  • Mallard
  • Mourning dove
  • Red-tailed hawk
  • Red-winged blackbird
  • Tree swallow
  • Violet-green swallow
  • Yellow-rumped warbler
  • Yellow Warbler

Amphibians & Reptiles

  • Bullsnake
  • Garter snake
  • Snapping turtle


Coming Soon


Water Rights

Since 1910, the Boulder and Left Hand Ditch Company has operated the two lakes, which are reservoirs used to store water for agriculture. Boulder and Left Hand Ditch Company still owns the rights to the water and Boulder County owns the land surrounding them.

Growing Gunbarrel

In the 1960s, thanks to the nearby IBM plant and other commercial attractions, the Gunbarrel residential area grew up around the lakes. The lakes have been central to the Gunbarrel community from the beginning.


Parks & Open Space

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Parks are open sunrise to sunset
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