The pilot "made a short field landing approach 3 pointing the aircraft at the approach end" of the 2,350 foot long by 100 feet wide grass runway. The pilot applied the brakes and "slowing seemed normal." Due to his position in the cockpit and the 3-point landing, the pilot could not "see the end of the runway until it was too late." The pilot then intentionally ground looped the airplane to avoid traveling off the end and into a ravine. The airplane turned 90 degrees and impacted trees. According to a Federal Aviation Administration inspector, witnesses reported the airplane's approach speed was "way too fast for the short runway." Examination of the airplane revealed the forward left wing spar was fractured. The pilot reported there were no mechanical anomalies with the airplane.