1876 AMC founded in Boston by Edward Pickering and 33 other outdoor enthusiasts

1879 First AMC hiking trail built in Tuckerman Ravine

1888 First AMC Hut at Madison Spring built

1907 First edition of AMC White Mountain Guide published

1911 Advocacy by AMC and other groups results in passage of Weeks Act, authorizing creation of Eastern National Forests

1912 New York Chapter founded as first AMC Chapter

1922 AMC moves into current headquarters at 5 Joy Street in Boston

1925 AMC helps to form Appalachian Trail Conference

1957 New Hampshire Four-Thousand Footer Club formed

1958 First Mountain Leadership School held

1968 Youth Opportunities Program launched to get urban and at-risk youth outdoors

1974 AMC partners with Friends of Bigelow and develops management plan for future Bigelow Preserve in Maine

1975 AMC wins permanent injunction against I-93 construction north of Franconia Notch based on deficiencies in project's Environmental Impact Statement

1980 AMC starts Trail Adopter program in White Mountains

1990 A Mountain Classroom school program expanded

1990 AMC plays a leadership role in founding Northern Forest Alliance

1993 AMC opens Mohican Outdoor Center in Delaware Water Gap National Recreation Area, in partnership with the US Park Service

1994 AMC negotiates Deerfield River Agreement, which becomes a national model for achieving conservation goals through the dam re-licensing process

1995 AMC launches Businesses for the Northern Forest with Northern Forest Alliance

1996 AMC begins monitoring ozone levels in the White Mountains

1996 AMC partners with the US Fish & Wildlife Service, US Forest Service and New England Wildflower Society on restoration of endangered Robbins Cinquefoil in the White Mountain National Forest

1998 AMC joins the Highlands Coalition, an advocacy group focused on land protection in the Highlands region of NewYork, New Jersey, Pennsylvania, and Connecticut, as fiscal agent and begins work on mapping "critical treasures" in four-state Highland region

1999 AMC, The Wilderness Society, and the Conservation Law Foundation issue "Mountain Treasures" report, calling for protection of roadless areas in the WMNF

1999 AMC granted new 30-year special use permit for operating its White Mountain hut system and Pinkham Notch Visitor Center

1999 Conservation Action Network (CAN) formed

1999 AMC selected as Eastern U.S. provider of Leave No Trace Master Educator Courses

2000 AMC creates Alpine Stewardship Program with US Forest Service

2001 AMC begins construction with Maine Appalachian Trail Club on new 42-mile Grafton Loop Trail

2002 Robbins Cinquefoil removed from Endangered Species list after 22 years, thanks to restoration efforts by AMC and partners

2002 AMC launches Leadership Training Institute

2003 AMC opens Highland Center at Crawford Notch, an outdoor program and education center based on an award-winning "green" architectural design

2003 AMC launches Maine Woods Initiative with purchase of 37,000 acres in 100-Mile Wilderness region from International Paper and purchase of Little Lyford Lodge and Cabins

2004 Highlands Conservation Act signed, based on advocacy by AMC and other members of the Highlands Coalition

2004 AMC develops computer-based windpower siting model; begins work with states to encourage adoption of uniform windpower siting guidelines

2005 AMC launches Mountain Watch "citizen-scientist" program, enabling members and guests to measure indicators of air quality and climate change

2005 AMC's Maine Woods Initiative receives $4.5 million Forest Legacy grant

2006 AMC purchases Medawisla Wilderness Lodge and Cabins, offers camp-to-camp skiing, as part of Maine Woods Initiative

2007 First online edition of White Mountain Guide offered

2007 AMC opens Greenville, Maine office as part of Maine Woods Initiative

2008 AMC dedicates Gorman Camps at Chairback Mountain (to open in 2011), in recognition of the leadership of Leon and Lisa Gorman in conservation, education, and outdoor recreation.

2009 AMC completes conservation purchase of 29,500-acre Roach Ponds Tract in Maine, completing 63 mile corridor of protected land in the 100-Mile Wilderness.

2010 Cummulative number of youth served by AMC's Youth Opportunties Program exceeds 100,000

2011 AMC opens Gorman Chairback Lodge and Cabins in Maine, including new LEED-registered "green" lodge building

2012 AMC Launches Kids Outdoors, a free online community to get families outdoors close to home in the Boston and New York City areas.

2012 AMC and The Trustees of Reservations announce a new collaboration to assist the Bay Circuit Alliance (BCA) in the completion, enhancement, and long-term protection of the 200-mile Bay Circuit Trail and Greenway.