Here is a list of some Colorado Christmas Bird Counts and the date from the CBC Website, there are other counts that the date hasn't been posted yet. Go to the Christmas Bird Count website to get information on how to join a count.
Aspen 12/14/2025
Boulder 12/14/2025
Evergreen-Idaho Springs 12/14/2025
Fairplay 12/14/2025
Gunnison 12/14/2025
Nunn 12/14/2025
Pagosa Springs 12/14/2025
Salida 12/14/2025
Steamboat Springs 12/14/2025
John Martin Reservoir 12/15/2025
Fountain Creek 12/17/2025
Meeker 12/19/2025
Colorado Springs 12/20/2025
Denver 12/20/2025
Dotsero 12/20/2025
Eagle Valley 12/20/2025
Fort Collins 12/20/2025
Granby 12/20/2025
Montrose 12/20/2025
Monte Vista NWR 12/20/2025
Broomfield 12/21/2025 (new count)
Durango 12/21/2025
Bonny Reservoir 12/27/2025
Cortez 12/27/2025
Douglas County 12/27/2025
Delta 12/27/2025
Barr Lake 12/28/2025
Crook 12/28/2025
Denver (urban) 1/1/2026
Loveland 1/1/2026
Black Forest 1/3/2026
Hotchkiss 1/3/2026
Rawhide Engery Station 1/3/2026
Brandon K Percival