Site Details

descriptions and directions

Cottonwood Marsh photo by Peter Burke

Accessible Windsor Reservoir - Weld County
Ownership: None Listed
Description: The largest and usually the most productive lake in northern Weld County, Windsor is difficult to scan. The best scanning is from the southeast, from the end of the dam at the intersection of the very busy CR 74 and CR 19. The lake can also be scanned, at a slightly greater distance but in more expansive fashion, from the north along CR 78. The outlet canal, which crosses CR 74 about a half-mile west of CR 19, can harbor wintering Killdeer and Wilson's Snipe, and should be checked at other seasons. It can be scanned from a pullout on the north side of CR 78. Windsor Reservoir often plays host to large numbers of diving ducks, particularly mergansers, as well as masses of geese. Gulls are present throughout the day, but starting in mid-afternoon (November-March), gulls fly into roost, and virtually anything is possible here (the rarest gulls to date being Glaucous-winged and Great Black-backed). The potential for loons and scoters here seems excellent.

Habitat: Pond/Lake/Reservoir, Hedgerow/Shelterbelt
Directions: To get to the South Side, take exit 265 off of I-25 (which is CO 68/Harmony Road). Go east, over the Weld County line (where the road becomes CR 74) for 5.5 miles. The small pullout and trail along the dam are just before the intersection with CR 19. To get to the North Side, take exit 269 off of I-25 (CO 14) and go east for 5 miles to CO 257. Turn right (south), and go 2 miles to CR 78. Take a left (east), and scan the lake, to the south, from along the road about a mile from CO 257. You can get from the north side to the south side by taking CO 257 2 miles further south to CR 74.
Other Wildlife:
Other Attractions:

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eBird Seasonal Bar Chart

Latest Windsor Reservoir Sightings from eBird


CBRC Records from Windsor Reservoir

SpeciesAccession No.Date(s)
American Black Duck2015-024 02/13/2015
Pomarine Jaeger2001-199 11/2/2001
Parasitic Jaeger1999-5010/18/1999
Long-tailed Jaeger#2015310/18/1902
Black-legged Kittiwake2010-158 12/4/2010
Lesser Black-backed Gull1999-622/10/1999
Lesser Black-backed Gull2001-11511/15/2001
Glaucous-winged Gull2013-267 11/13/2013