At about 1200 eastern time, a Socata TB 9 overran the runway after aborting takeoff at Huntingdon County Airport. The pilot was not injured. The pilot reported he was departing on runway 22, a 3,120 feet-by-80 feet gravel and turf runway. The pilot said the runway was too soft and the airplane did not accelerate properly. He was able to lift the nose gear off the ground, but the airplane would not become airborne. The pilot then aborted the takeoff and the airplane overran the runway into a ditch.