Founded in 1892, Sierra Club is one of the largest grassroots environmental organizations in the United States. Based in San Francisco, Calif., the club offers protection for communities, wild places and the planet. It focuses on green transportation, limiting greenhouse emissions, safeguarding communities and provides clean energy solutions, to name a few. Sierra Club conducts an array of programs, such as building bridges to the outdoors, environmental law program, zero waste as well as Sierra club green home, among others.

Website: sierraclub.org

Phone: (303) 861-8819

Cross Streets: Near the intersection of W 5th Ave and F St