The trail continued west to Three Island Crossing (near present-day Glenns Ferry.) Here most emigrants used the divisions of the river caused by three islands to cross the difficult and swift Snake River by ferry or by driving or sometimes floating their wagons and swimming their teams across. The crossings were doubly treacherous because there were often hidden holes in the river bottom which could overturn the wagon or entangle the team, sometimes with fatal consequences. Before ferries were established there were several drownings here nearly every year.