Other notable summits included George Bush and Mikhail Gorbachev in 1990, and Bill Clinton and Boris Yeltsin in 1997.
Notable summits, all above 5,300 feet (1,600 metres), include Tadramol, Pushpagiri, and Kottebetta.
Notable structures included summit hotels and inns on Mount Holyoke, Mount Tom, Sugarloaf Mountain, and Mount Nonotuck.
The leaders are "very firm on the need to uphold international principles". The remarks capped off a weekend of personal isolation for the Russian president at a G-20 summit notable for the other leaders' awkwardness around him.
The Copenhagen Accord, which contained no national commitments or enforcement mechanisms, would turn out to be the only notable achievement of the summit, though, as even many of its backers observed, it wasn't terribly notable.
Behavior as a driver of health was a big topic at this year's summit, a notable change from the past.
That summit was notable for mass protests, riots, and cars burning in the streets.
Yet the absence of nuclear superpower Russia from the summit was notable, and Obama and other leaders debated at length how to keep nuclear materials from terrorists, a vexing question that has dogged world leaders since well before Sept. 11.
It follows the ridge of the southern Green Mountains, summitting such notable peaks as Stratton Mountain, Glastenbury Mountain, and Killington Peak.
The summit was also notable for further signs of a thaw in US-Cuban relations.
