At Altitude

An Ecological Haven Gets a $9 Million Makeover

Aspen Center for Environmental Studies’(ACES) reopened the Catto Center at Toklat this winter after a three-year restoration project.

07/29/2025 By kaya williams

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A Birding Big Year in a Small Valley

Aspen and its environs are home to more than 150 avian species; two local birders set out to view as many of them as possible in 12 months.

07/14/2020 By Rebecca Weiss Photography by Mark Fuller

Your Perfect Day

Where to Do Outdoor Yoga Around Aspen

Keep the flow going all summer by taking your poses into the most natural setting of all.

07/30/2019 By Ali Margo

preserving nature

ACES Celebrates Its Golden Anniversary

For 50 years, the Aspen Center for Environmental Studies has promoted the richness of nature through education and stewardship.

07/29/2019 By Rebecca Cole

Natural Cycle

Aspen Center for Environmental Studies Debuts a Custom Biking Kit

Pedal with a purpose while looking fly.

05/24/2019 By Cindy Hirschfeld

Wing It

Local Birds, By the Numbers

Fact checking the Roaring Fork Valley's feathered friends.

05/22/2019 By Cindy Hirschfeld

Datebook

Aspen Weekend Agenda: September 21–23, 2018

Pick your pleasure from music, comedy, fall photography, a half marathon, and more this weekend.

09/19/2018 By Aspen Sojourner Staff

Party Pictures

ACES Evening on the Lake July 2018

A fab feast, inspiring conversation, and canoe rides combined for a magical night.

08/13/2018 Photography by Nancy M. Mayer

Datebook

Aspen Weekend Agenda: August 3–5, 2018

Live music, theater, ice cream, mountain biking, and First Friday are the headliners for an exhilarating weekend.

08/01/2018 By Aspen Sojourner Staff

Sustainability

A Q&A with Annie Leonard, the Executive Director of Greenpeace USA

Even with all the obstacles faced by the environmental movement, Leonard is hopeful about the future.

07/18/2018 By Allison Pattillo

At Altitude

Get Lost in the Trees at ACES

A new viewing platform gives a bird's eye view of wildlife.

05/23/2018 By Rebecca Cole

Relax

Find Outdoor Bliss With Three Guided Hiking Experiences

Hiking is Aspen’s summer recreation of choice; increase the options with a guided trail experience.

05/01/2016

Aspen Honorees

Sojourner Salutes Holiday 2015

Artist, potter, teacher, writer: a human-scale version of our annual tribute to those who make our home special.

11/01/2015 By Susan Benner, Julie Comins Pickrell, and Jay Cowen

Local Heros

Sojourner Salutes Award Honorees

For nearly two decades, this magazine’s Sojourner Salutes awards have paid tribute to the givers, doers, and fighters who make the Roaring Fork Valley exceptional.

11/01/2012 By Jay Cowen