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

Datebook

Aspen Weekend Agenda: August 24–26, 2018

History tours, live music and performances, pianos for a good cause, and the Tough Mudder are just a sampling of this weekend's entertainment options.

08/22/2018 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

Call & Response

Chip Giller's Beacon in the Smog Is Brighter Than Ever

We sat down with the Grist founder and ACES 2017 Honoree for a conversation that left us feeling the most hopeful yet since last November.

07/18/2017 By Katie Shapiro

People & Places

ACES Evening on the Lake 2016

An annual benefit for the Aspen Center for Environmental Studies,’ the enchanting Evening on the Lake included a farm-to table dinner, a talk by conservation scientist M. Sanjayan, and moonlit boat rides.

11/27/2016 Photography by Nancy M. Mayer

Slideshow

ACES' 15th Annual Harvest Party

Aspen Center for Environmental Studies' Rock Bottom Ranch played host to an idyllic autumn afternoon.

10/17/2016

BYOB

Trending in Town: Bike-To-Farm Dinners

Bring your own bike to these four pedal-powered epicurean experiences.

08/03/2016 By Laurel Miller

FLOAT ON

Preserving the Peace at North Star Nature Preserve

Threatened by overenthusiastic users, Aspen's North Star area benefits from greater outreach this summer.

08/02/2016 By Tess Weaver Strokes

Raptor Audience

How to Spy on Birds? Pitkin County's Osprey Cam

The Emma ospreys have returned for the season to their nest near Highway 82 in Basalt.

02/01/2016 By Todd Hartley

At Altitude

The Thrills of Birding in Aspen

Here in the land of hard-core mountain sports, a more decorous outdoor endeavor is taking flight.

10/22/2015 By Michael Miracle