At about 0930 Pacific time, a Piper PA-24-250 lost engine power during cruise and crashed during a forced landing on a highway near Fallon. The pilot was not injured. The local flight departed Fallon Municipal Airport about 0815 and the pilot flew to Lovelock, Nev., to practice takeoffs and landings. He was returning to Fallon when the engine lost power. The pilot said the accident was due to fuel exhaustion.