Lt. Gregg Hastings says the 40-year-old man driving the pickup was able to escape and swim to shore Monday afternoon but wasn't able to save his son. The father was taken to a hospital for treatment of non-life-threatening injuries.
Skamania County, Wash., sheriff's divers found the pickup and the boy's body about 9:30 p.m. Monday in about 40 feet of water.
Hastings said the names of the father and son would be released Tuesday.
The right hand westbound lane of the freeway was blocked for several hours east of Hood River.