Site Details

descriptions and directions

Cottonwood Marsh photo by Peter Burke

Accessible Jim Hamm Nature Area - Boulder County
Ownership: None Listed
Description: This tiny park, with its tiny lake and its short row of trees, probably would not be anywhere near as popular if it were not right across the road from Union Reservoir (which is in Weld County). Due to its location, Jim Hamm often "skims off" birds from Union, and the friendly size of Jim Hamm ensures that if there are rarities here, you won't miss them. Waterbirds are usually the main attraction, but the trees and brush piles on the north side can have migrants and wintering landbirds as well.

Habitat: Pond/Lake/Reservoir, Hedgerow/Shelterbelt
Directions: From CO 119 just east of Longmont (4 miles west of I-25), turn north on County Line Road (sign for Union Reservoir). The nature area parking lot is on the left in just over two miles.
Other Wildlife:
Other Attractions:

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Other Sites in Boulder County
eBird Seasonal Bar Chart

Latest Jim Hamm Nature Area Sightings from eBird


CBRC Records from Jim Hamm Nature Area

SpeciesAccession No.Date(s)
Black-headed Gull23-90-224/14/1990
Short-billed Gull2001-1443/5/2001
Short-billed Gull2004-109 
Arctic Tern2010-102 6/13/2010
Hermit Warbler1999-1305/17/1999