The airplane impacted a hill at about 0655 Mountain time shortly after departure, killing the two private pilots. The airplane sustained substantial damage. Instrument conditions prevailed; no flight plan had been filed. The debris stretched over 200 feet from the first impact on a bearing of 280 degrees. The accident site elevation was about 6850 feet MSL. At 0656, a local weather observation reported calm wind, 10 miles visibility, scattered clouds at 800 feet, broken clouds at 1500 feet and an overcast at 2200 feet.