Brush Hollow Reservoir is an 88-acre lake within the 461-acre Brush Hollow State Wildlife Area near Penrose, Colorado. The reservoir features a boat ramp on the eastern shore and permits non-wake boating, making it popular for kayaks and canoes. A state fishing or hunting license is required for all visitors 18 and older.

Water levels fluctuate throughout the season as the reservoir serves as the primary water source for Penrose. The water temperature ranges from cool in spring to warm in summer. High mercury levels exist in the water, so contact sports including swimming and wading are prohibited.

A loosely defined 2-3 mile trail circumnavigates the reservoir, offering views of the Wet Mountains to the south. The surrounding landscape features pinyon-juniper forest and desert brush. Paddlers should be alert for rattlesnakes, particularly along shoreline areas.

The reservoir supports diverse wildlife viewing opportunities. Visitors may encounter prairie dogs, pronghorn, deer, foxes, and various waterfowl. Osprey frequent the area, and blue herons can be spotted along the shoreline during spring and fall migrations.

Facilities include restrooms, parking areas, and the boat launch. The site is open year-round during daylight hours. No camping is permitted within the wildlife area.

Local paddlers report that winds can affect conditions, particularly in the afternoon. The relatively small size and wake restrictions make this best suited for fishing and casual paddling rather than extended trips. During high water periods, some access roads may become submerged.

The clear mountain views and abundant wildlife create an engaging paddling environment, though the desert setting means limited shade. Basic amenities and wake restrictions help maintain a quieter atmosphere focused on fishing and nature observation.