Extreme Mount Washington

More than a quarter million people visit the summit of Mount Washington each summer by car, train, or foot. But in winter, sub-zero temperatures, hurricane-force winds, blowing snow and incredible ice claim the peak, creating an arctic outpost in a temperate climate zone. Known as the Home of the World’s Worst Weather, Mount Washington’s winter conditions rival those of Mount Everest and the Polar regions.

This remarkable, otherworldly landscape is completely inaccessible to all but the most experience winter mountaineers… until now.

Mount Washington Observatory’s newest educational offering, Extreme Mount Washington delivers the science and excitement of a Mount Washington winter to summer visitors of all ages through high-tech, hands on exhibits. Learn how rime ice forms, pilot a snowcat, see how Mount Washington Observatory scientists observe and record the infamous conditions and more. Get a taste for life in the alpine zone, no ice axes required!

Made possible by generous support from:


Extreme Mount Washington is located inside the Mt. Washington State Park Sherman Adams Visitor Center, so please visit the Mt. Washington State Park website to plan your visit. When the building is open, Extreme Mount Washington operates from 9AM to 5PM daily.


General Public
Adults and children 7 and older: $2
Children 6 and under: Free

Mt. Washington Auto Road Patrons
Admission is included in the cost of your Auto Road ticket. Your sticker is your admission pass.

Mount Washington Cog Railway Patrons
Admission is included in the cost of your railway ticket. Your railway ticket is your admission pass.

Mount Washington Observatory and ASTC Members
All supporting Mount Washington Observatory members and members of partner ASTC institutions receive complimentary admission.


Extreme Mount Washington is located inside the Mt. Washington State Park Sherman Adams Visitor Center. For directions to Mt. Washington State Park on the summit of Mount Washington, please visit our Getting & Staying Here page.

Once at the summit, proceed inside the Visitor Center and look for the Extreme Mount Washington signage. The museum is located in the lower level of the building.

Thank You

Mount Washington Observatory offers its sincere gratitude to the following foundations, corporations and individuals, whose collective generosity has made Extreme Mount Washington possible:

Gladys Brooks Foundation
Jane’s Trust
Neil and Louise Tillotson Fund of the New Hampshire Charitable Foundation
Public Service of New Hampshire and the Northeast Utilities Foundation
Putnam Foundation
Charles S. Raizen Foundation
Cogswell Benevolent Trust
Samuel P. Hunt Foundation
The Waterman Fund
Thomas W. Haas Fund of the New Hampshire Charitable Foundation
Winthrop Charitable Gift Fund

And all of the generous individuals who supported this project, many of whom are recognized on tiles featured in a unique mosaic display within Extreme Mount Washington.

Mount Washington Observatory would also like to recognize and thank the following individuals and organizations for their support of and collaboration on this ambitious project:

Appalachian Mountain Club Alain Comeau
Jeff Kennedy Associates Joe Lentini
Gensamer Electric Glen Group
Tom Guilmette Chris Joosen
MegaPrint Milford Flooring
Moss Creek Media Mount Washington Auto Road
Rick Wilcox Mount Washington Observatory Staff and Trustees
Mount Washington State Park Mystic Scenic Studios
New Hampshire Department of Resources and Economic Development
Ken Rancourt
Richard Lewis Media Group Neil Shea
TechnoFrolics TownSquare Media – WOKQ/WPKQ
White Mountain National Forest