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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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Know Your Trees | Tree Identification Walk

Know Your Trees | Tree Identification Walk

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

Advance registration is required.

Tuesday Birding at Rock Bottom Ranch

Tuesday Birding at Rock Bottom Ranch

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

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

ACES Summer Camp

ACES Summer Camp

Aug. 8th, 9:30am to 3:30pm

General registration is OPEN.

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.

North Star Birding: Early Migration

North Star Birding: Early Migration

Aug. 17th, 7:30am to 10:30am

In partnership with Pitkin County Open Space & Trails

Dispersing juvenile birds and early migrants are on the move by mid-August.

Spoon Carving

Spoon Carving

Aug. 17th, 5:00pm to 8:00pm

A collaboration with the Art Base

Join artist

Nature Journaling

Nature Journaling

Aug. 18th, 9:00am to 1:00pm

Explore this artistic, scientific, and reflective practice to enhance and integrate your connection with nature through journaling.

Jessica Catto Dialogue: Climate Change and Megafires in Our Backyard

Jessica Catto Dialogue: Climate Change and Megafires in Our Backyard

Aug. 18th, 6:00pm to 7:00pm

Join ACES at the Hotel Jerome for a Jessica Catto Dialogue on August 18 from 6-7pm.

Open Space Fall Bird Migration Field Trip | Upper Roaring Gorge

Open Space Fall Bird Migration Field Trip | Upper Roaring Gorge

Aug. 25th, 7:30am to 11:00am

In partnership with Pitkin County Open Space & Trails

The gorge of the Roaring Fork is an oasis of native habitat on open space properties that run the length of the river as it passes Red Butte and flows downstream through the deeply cut river gorge.

Burlap Dinner | Low-Till Vegetable Production

Burlap Dinner | Low-Till Vegetable Production

Aug. 25th, 6:00pm to 8:00pm

SOLD OUT.

Burlap Dinner | Hoop Houses: the Multi-use Structure

Burlap Dinner | Hoop Houses: the Multi-use Structure

Sep. 1st, 6:00pm to 8:00pm

SOLD OUT.

North Star Birding: Fall Birds

North Star Birding: Fall Birds

Sep. 7th, 7:30am to 10:30am

In partnership with Pitkin County Open Space & Trails

Join us for this birding outing that will focus on local fall birds in the quiet, expansive setting of North Star where the river and wetlands make this location especially important for migration activities.

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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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