It's Annual Giving Season!

A love of nature and learning begins at Aspen Center for Environmental Studies.

ACES' educational programs are reaching more students, families, and adults than ever. But we can't do it without your support!

Please consider a gift to ACES to provide immersive educational experiences for people of all ages, connect our community to nature, and inspire meaningful environmental stewardship.

Support ACES with a general donation, contribute to our Colorado Gives Day campaign, or donate to our Giving Tuesday initiative to raise funds for ACES Ed classrooms.

Ways to Give

December Events

Olaf the Elf Visits Hallam Lake

Wednesday, December 13, 2023

4pm - 5:30pm

Join us for a magical winter afternoon with Olaf, the winter elf! Enjoy hot chocolate, a story about Olaf, arts and crafts, and an adventure out into the winter wonderland to help Olaf feed the animals of Hallam Lake.

More info

Christmas Bird Count

Sunday, December 17, 2023

7:30am - 3pm

Join local birders for the 124th Audubon Christmas Bird Count (CBC), the longest-running citizen science survey in the world. This census has assessed the health of bird populations and guided conservation action since 1900. 

More info

Winter Programs

The Wisdom & Medicine of the Earth Workshop

Monday, December 4 & 11

5:30pm - 7pm

Join Buddhist eco doula and PhD psychologist Lindsay Branham in a three-part workshop. Learn how we can shape collective futures if we are willing to build loving, lasting reciprocal relationships with the Earth.

Winter Birding

Tuesday, December 5

8am - 11am

Join us on the first Tuesday of the month from November through April and discover the joy of birding! We will learn about non-breeding plumages, winter foraging strategies, and behaviors of migratory and resident birds.

Winter Naturalist Tours Begin December 11!

Daily, 10am & 1pm

Aspen Mountain & Snowmass

Enjoy a walk through the snow with an ACES Naturalist, learning (or fine-tuning!) your knowledge of the wildlife and history of the Roaring Fork Valley. We also offer private snowshoe tours and an Ashcroft Snowshoe Tour.

Winter Explorers Holiday Camp

December 29 & January 2-4

9:30am - 12:30pm

Registration opens December 2 at 12pm MST!

This winter break, ACES will be offering our Outdoor Winter Explorers Camp December 29 and January 2-4 at Hallam Lake for kids currently enrolled in grades K-4.

Winter Nature & Me registration opens December 2 at 12pm MST

View all upcoming programs and events