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    Every other Tuesday, varying times 

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

    Tuesday Birding at Hallam Lake

    Every other Tuesday, varying times 

    Hallam Lake
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Walk on the Other Side Walks

Walk on the Other Side Walks

Aug. 24th, 9:00am to Oct. 6th, 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.

Evening of the Elk Walks

Evening of the Elk Walks

Oct. 12th, 6:00pm to 8:00pm

in partnership with Pitkin County Open Space & Trails

As the days grow short, the visions of summer are replaced by wisps of snow on the peaks, golden quaking aspens, and the urgency of winter… Each Fall the North Star Preserve hosts one of nature’s truly magical rituals, the Rocky Mountain Elk Rut.

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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