March 12, Jackson, Wyo. / Beech Bonanza

At approximately 12:15 mountain time, a Beech A36 struck terrain at 10,400 feet msl on Pinnacle Peak, 15 miles southeast of Jackson, while in cruise flight. All five aboard were killed. IMC prevailed but no flight plan as filed. The flight had originated from Garden City, Kan., at 07:00 and the pilot had canceled flight following near Pinedale, Wyo., at 11:41.