Site Details

descriptions and directions

Cottonwood Marsh photo by Peter Burke

Brush Hollow Reservoir and State Wildlife Area - Fremont County
Ownership: None Listed
Description: The lake and adjacent State Wildlife Area are located a few miles north of Penrose. There is one main dirt road that runs through this area but be aware that parts of it become quite challenging due to deep rutting and it becomes very muddy after precipitation. Passenger cars can always access parts of the area, but 4WD high clearance vehicles are sometimes needed to access some areas.

There are several picnic shelters on the west side and 3 vault toilets located around the area. Some birding can be done from the dirt roads.

Birding is best done from late fall through early spring as this area has heavy use by motorboats and shore fishermen during warm times of the year. Depending upon the water level in this municipal and agricultural water supply reservoir, there can be waterfowl and shorebirds to see. Though this area gets low numbers of gulls and terns, some rarities have been found here. Blue-gray Gnatcatcher, Townsend's Solitaire and Juniper Titmouse can be seen in the pinyon-juniper areas on the west shore. Bushtits are seen fairly often. Ladder-backed Woodpeckers are sometimes found around the dam area. Hundreds of Mountain and Western Bluebirds frequent the fields here.

Driving around the town of Penrose itself can often be a rewarding experience, with Black-chinned Hummingbirds breeding, and a good chance of running into the local Pinyon Jay flock.

Habitat: Reservoir, Pinyon-Juniper Forest, Cholla
Directions: Take C-115 north of US-50 to the north side of Penrose, and head west on 3rd St. for a little under 2 miles to CR F42, on your right. Head north on CR F42 for a little under a mile to the reservoir.
Other Wildlife:
Other Attractions:

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eBird Seasonal Bar Chart

Latest Brush Hollow Reservoir and State Wildlife Area Sightings from eBird


CBRC Records from Brush Hollow Reservoir and State Wildlife Area

SpeciesAccession No.Date(s)
Trumpeter Swan8-84-1212/13/1983 - 12/14/1983
Red-throated Loon2009-41 5/19/2009
Scott's Oriole2016-041 05/10/2016