From the NY Times review of 2010 Cheverolet Equinox:
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And to think that I believed that Mt. Mitten was a bushwhackON a late summer day I am climbing ever higher on the Jefferson Notch Road, a narrow, lonely dirt ribbon through the White Mountains. By the time I reach Mount Mitten — one of the world’s least majestically named peaks — the new Chevy Equinox has shown some highs and some lows.
...
Eventually, I approached the top of Mount Mitten. It got its name in April 1771 when a man chasing a moose lost a mitten near the summit, according to the book “Place Names of the White Mountains” by Robert and Mary Julyan (University Press of New England).