Fish and Game officials are warning snowmobilers of potentially perilous trail conditions, after a Maine man was badly injured when he crashed his machine Wednesday afternoon on an icy hill in Chatham.

Matthew Dillon, 54, of Fryeburg, Maine, was the last rider in a group of three when he failed to negotiate a downhill section of trail and his machine rolled, according to a news release from New Hampshire Fish and Game. When friends realized Dillon was not behind them, they returned to find him and called 911.