Don't miss Morning Birding on the first Tuesday of every month!
Join us every Friday this winter at Rock Bottom Ranch!

Our Mission



ACES' mission
is educating for
environmental responsibility.

Featured Video

See video

Bear Swimming at Hallam Lake

Hallam Lake, 25-acre nature preserve and visitor center, has a wide diversity of wildlife. This video, captured by our trail cams, features a black bear taking a swim in Hallam Lake.

ACES BLOG

Morning Birding Species List | January 8, 2019

Tuesday, January 8, 2019, 8AM - 11AMWeather: SunnyLocation: Hallam Lake and the West End of Aspen

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Potbelly Perspective at Snowmass: Skiing Snowmass' Famed Peaks
Join Art Burrows for a special "Snowmass Edition" Potbelly Perspective!More details on Art's presentation coming soon. Stay tuned for more... more
Building a community of knowledgeable, capable, and motivated environmental stewards.
Hallam Lake
Monday - Saturday 9AM - 5PM
Closed Christmas Day &
New Year's Day
Tel: 970.925.5756
aces@aspennature.org
100 Puppy Smith Street
Aspen, CO 81611
Rock Bottom Ranch
Friday 9AM - 5PM
Closed Christmas Day &
New Year's Day
Tel: 970.927.6760
aces@aspennature.org
2001 Hooks Spur Road

Basalt, CO 81621
Catto Center at Toklat
Call for details
Tel: 970.925.9157
Fax: 970.925.4819
aces@aspennature.org
11247 Castle Creek Road
Aspen, CO 81611
Spring Creek
Call for details
Tel: 970.925.5756
Fax: 970.925.4819
aces@aspennature.org
25 miles up Frying Pan River Road to
Eagle-Thomasville Road.
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