At approximately 0855 mountain time, a Piper PA-28-180 crashed while maneuvering near Gypsum, killing one passenger and leaving the other three occupants seriously injured. A flight instructor departing behind the accident flight said the airplane used about 5,000 feet to become airborne, then began a slow climb toward rising terrain, where it maintained 200-300 feet agl. The airplane crashed about 19 miles from the airport at an elevation of about 10,050 feet msl and a density altitude of more than 13,000 feet.