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    Every other Tuesday, varying times 

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    Every other Tuesday, varying times 

    Hallam Lake

    North Star Birding: Early Migration

    Aug. 17th, 7:30am to 10:30am North Star
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Birds of Prey Demonstration

Birds of Prey Demonstration

Aug. 8th, 4:00pm to Oct. 21st, 5:00pm

Registration opens June 10.

Know Your Trees | Tree Identification Walk

Know Your Trees | Tree Identification Walk

Aug. 8th, 4:00pm to 5:00pm

Advance registration is required.

River Run Sunset Hike

River Run Sunset Hike

Aug. 8th, 5:00pm to Nov. 20th, 8:00pm

The evening version of our Green World Day Hike, this Naturalist guided adventure will explore the majesty of the Castle Creek valley at sunset.

Snowmass Wildflower Walk

Snowmass Wildflower Walk

Aug. 8th, 10:00am to Oct. 25th, 12:00pm

Snowmass Wildflower Walk is offered daily at 10am from Saturday, June 18, 2022 - Sunday, September 4, 2022.

Maroon Bells Maroon Lake Walk

Maroon Bells Maroon Lake Walk

Aug. 8th, 10:15am to Oct. 26th, 2:00pm

Maroon Bells Maroon Lake Walk is offered daily at 10:15am and 1:15pm from Saturday, June 18, 2022 - Monday, September 5, 2022.

Maroon Bells Crater Lake Hike

Maroon Bells Crater Lake Hike

Aug. 8th, 10:15am to Oct. 26th, 3:15pm

Maroon Bells Crater Lake Hike offered daily at 10:15am and 1:15pm from Saturday, June 18, 2022 - Monday, September 5, 2022.

Green World Day Hike

Green World Day Hike

Aug. 8th, 10:30am to Nov. 28th, 2:30pm

Offered from mid-June through the end of September, by reservation only.

Aspen Mountain Walk

Aspen Mountain Walk

Aug. 8th, 11:00am to Oct. 26th, 4:00pm

Aspen Mountain Walk is offered daily on the hour from 11am - 3pm.

Snowmass Ice Age Discovery Hike

Snowmass Ice Age Discovery Hike

Aug. 8th, 1:00pm to Oct. 25th, 3:00pm

Snowmass Ice Age Discovery Hike is offered daily at 1pm from Saturday, June 18, 2022 - Sunday, September 4, 2022.

Wild Yoga

Wild Yoga

Aug. 9th, 5:15pm to 6:30pm

ACES &

Sunset Beaver Walk

Sunset Beaver Walk

Aug. 9th, 7:30pm to Oct. 20th, 8:30pm

Advance registration is required.

Tuesday Birding at Hallam Lake

Tuesday Birding at Hallam Lake

Aug. 16th, 6:30am to 9:30am

This class requires advanced registration to ensure appropriate planning for the field experience.

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Rock Bottom Ranch

Tuesdays - Fridays, 9am-4pm
Saturdays, 9am-1pm
Tel: 970.927.6760

2001 Hooks Spur Road
Basalt, CO 81621

Hallam Lake

Mon - Fri, 9am-5pm
Sat, 9am-5pm in summer
Tel: 970.925.5756

100 Puppy Smith Street
Aspen, CO 81611

Catto Center at Toklat

Closed for renovations until spring 2023
Tel: 970.925.9157

11245 Castle Creek Road
Aspen, CO 81611

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