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    Tuesday Birding at Rock Bottom Ranch

    Every other Tuesday, varying times 

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    Jul. 13th, 9:00am to 4:00pm Hallam Lake

    North Star Birding: South Side of the River

    Jul. 18th, 7:30am to 11:30am North Star
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Snowmass Wildflower Walk

Snowmass Wildflower Walk

Jul. 6th, 10:00am to Sep. 22nd, 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

Jul. 6th, 10:15am to Sep. 23rd, 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

Jul. 6th, 10:15am to Sep. 23rd, 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

Jul. 6th, 10:30am to Oct. 26th, 2:30pm

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

Aspen Mountain Walk

Aspen Mountain Walk

Jul. 6th, 11:00am to Sep. 23rd, 4:00pm

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

Snowmass Ice Age Discovery Hike

Snowmass Ice Age Discovery Hike

Jul. 6th, 1:00pm to Sep. 22nd, 3:00pm

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

River Run Sunset Hike

River Run Sunset Hike

Jul. 6th, 5:00pm to Oct. 18th, 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.

ACES Summer Camp

ACES Summer Camp

Jul. 11th, 9:30am to 3:30pm

General registration is OPEN.

Know Your Trees | Tree Identification Walk

Know Your Trees | Tree Identification Walk

Jul. 11th, 4:00pm to 5:00pm

Advance registration is required.

An Evening on the Lake

An Evening on the Lake

Jul. 21st, 6:00pm to 9:30pm

Walk on the Other Side Walks

Walk on the Other Side Walks

Jul. 27th, 9:00am to Sep. 8th, 1:00pm

Join ACES Director of Naturalist Programs, Jim Kravitz on this rare opportunity to discover the far side of the North Star Preserve, which is otherwise closed to the public.

Stars Above Aspen

Stars Above Aspen

Aug. 4th, 6:00pm to 10:30pm

Aspen Center for Environmental Studies invites you to the top of Aspen Mountain for our annual Stars Above Aspen Astronomy Night on Thursday, August 4 from 6:00-10:30pm.

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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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