COOS COUNTYâ Inexperience was cited by the New Hampshire Fish and Game Department as the cause in three separate snowmobile crashes that resulted in serious injuries to the operators. A Massachusetts woman suffered serious injuries when she lost control of her rental snowmobile Saturday morning on Trail 12a near the warming hut in Randolph. Colleen M. Legros, 43, of North Andover, Mass., told authorities she had been riding for about an hour when the accident occurred. Legros told authorities she had little experience snowmobiling and was making a turn when she suddenly mistook the throttle for the brake and accelerated abruptly over a snowbank, through the air and into a tree.