Site Details

descriptions and directions

Cottonwood Marsh photo by Peter Burke

Antero Reservoir - Park County
Ownership: None Listed
Description: This very large reservoir can be a very hot spot! In particular, this lake is better for shorebirds and waders than either Spinney or Eleven Mile. Snowy Plover and Burrowing Owl have bred here, and mixed flocks of shorebirds can be seen during migration. The best shorebird habitat can often be found on a couple of small ponds right around the entrance to the reservoir off of US 24. Rarities that have been seen at Antero include Red-throated Loon, Short-billed Dowitcher, Glaucous-winged Gull and Red Phalarope. Large numbers of ducks, geese, and loons can also be seen here during migration, including South Park's signature scoters. Scanning this reservoir is hard, as the west side is inaccessible, but the other three sides can be scanned from various pullouts and parking lots. After being drained due to drought, Antero is once again filling up and open to the public, and the birds are back too!

Habitat: Pond/Lake/Reservoir
Directions: From Antero Junction, head east on US 24 about six miles to the entrance road to the reservoir (CR 78) on the left.
Other Wildlife:
Other Attractions:

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Latest Antero Reservoir Sightings from eBird


CBRC Records from Antero Reservoir

SpeciesAccession No.Date(s)
Red-necked Grebe2021-010 29 Apr 2021
White-rumped Sandpiper2012-074 6/3/2012
Short-billed Dowitcher19-73-1088/19/1973
Red Phalarope1997-0336/8/1997
Red Phalarope2011-123 9/20/2011
Jaeger sp.22-87-278/30/1987
Parasitic Jaeger2014-147 09/16/2014
Long-tailed Jaeger2011-122 9/20/2011
Long-tailed Jaeger2017-053 08/26/2017
Long-tailed Jaeger2017-054 08/31/2017
Glaucous-winged Gull23-82-727/24/1981 - 7/25/1981
Glaucous-winged Gull2008-129 10/31/2008
Red-throated Loon#5585 CC 
Yellow-billed Loon2008-128 10/29/2008
Brown Pelican3-91-77/1/1991 - 7/9/1991
Snow Bunting2014-163 10/31/2008