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descriptions and directions
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Black Hollow Reservoir
Black Hollow is a sizeable reservoir that is difficult to view. Fortunately, most of the birds hang out on the side close CR 19. Depending where the birds are, the best views are from the mailboxes at the jog in the road or a 100 meters or so up the hill south of the mailboxes. Since the birds are to your east and somewhat distant afternoons are best, particularly if there are not many heat waves. Many of the gulls from the North Weld County Landfill come to rest and bathe here, and often >1000 are present, often including multiple Lesser Black-backed and Thayer's Gulls plus the occasional Glaucous Gull. Also, a smattering of grebes and ducks are often present, and in season, a handful of shorebirds can be found at a muddy inlet not far from the road. Seasonally birds such as Sage Thrasher and Mountain Bluebird are occasionally encountered along CR 19 as one heads to Black Hollow from CO-14.
To reach Black Hollow Reservoir, take exit 269 off of I-25 (CO 14) and go east for 6 miles to CR 19. Take a left (north) onto CR 19 and go 2 miles to the jog in the road.
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eBird Seasonal Bar Chart
Latest Black Hollow Reservoir Sightings from eBird
CBRC Records from Black Hollow Reservoir