This bench has been at several different locations on Aspen Mountain. The line is from Hunter S. Thompson's book "Kingdom of Fear" page 134. ("At the top of the mountain we are all snow leopards.") A photo of this page of the book is below.
This is a quote from this Aspen Art Museum page, http://old.aspenartmuseum.org/archive/archive_restless_empathy_artists_projects.html: "Lars Ø. Ramberg’s project uses the late journalist Hunter S. Thompson as a platform for addressing the concept of empathy. Thompson was a longtime Aspen resident who ran for Sheriff in 1970. He committed suicide at his home in nearby Woody Creek in 2005. Ramberg has created memorial benches for Hunter S. Thompson based on the standardized memorial benches commonplace throughout town. The benches are installed throughout Aspen, each including quotes from Thompson that add up to a larger text characteristic of what Ramberg terms Thompson’s “warm anarchism,” and upending the sentimentality associated with memorializing."
Photos of the bench are below; click on the images to enlarge them.