Search and rescue crews are searching the Clarks Fork River just south of Fromberg Wednesday night for a 13-year-old boy who went missing while recreating on the river.Carbon County Sheriff Josh McQuillen told MTN that witnesses saw the boy go underwater in the river, which does have some dangerous holes even when the river is not running high.The boy, who was identified only as Ephraim in a post by the sheriffs office, was last seen wearing a black t-shirt and pink dinosaur shorts.Dive crews are searching part of the river. An emergency drone and the Yellowstone County Sheriffs Office helicopter were also called out for the search.The public is being asked to stay away from the river while the search for the boy continues. ...read more read less