What happened
The pilot had spent the morning shooting a moose and quartering the animal. He transported the meat to an unimproved landing area before walking back to his cabin for his aircraft. Upon returning, he landed and loaded two quarters into the back seat. It was now 5:30 PM and starting to snow. He taxied for takeoff without accomplishing a run-up. While taxiing, he experienced difficulty with the windshield fogging and, although in a hurry, managed to clean the windshield. When he reached the end of the strip, he immediately began the takeoff. The aircraft failed to accelerate properly during takeoff and settled back to the surface at the end of the strip.
Findings
The pilot believed that carburetor ice and a rough runway contributed to the lack of acceleration. The failure to perform a run-up prior to takeoff in snowy conditions likely allowed carburetor ice to develop or persist, reducing engine power during the critical takeoff phase.