Share your thoughts on this story: A music camp for grown-ups on Lake Winnipesaukee

An impromptu jam session takes place in what campers fondly refer to as the fireside room at Miles of Music Island Camp on Three Mile Island in New Hampshire. Erin Clark/Globe Staff

The 12-minute motorboat ride from Meredith, New Hampshire, across Lake Winnipesaukee transports them to another world. Cellphones disappear into cabin drawers while the sounds of fiddles, banjos, and guitars drift through the pine trees of Three Mile Island. Since 2011, novices and professionals alike have made the pilgrimage to Miles of Music Island Camp. Some come for their first time, others for their 14th.

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