Background
While enroute to a destination through a mountain pass, the pilot observed approaching snow and decided to return to the departure airport and land.
Approach and Go-Around
As the pilot was returning, a rapidly moving snow squall was approaching the airport. At approximately 1/4 mile from the end of Runway 1, visibility dropped to about 1/8 mile in heavy snow. The pilot landed on the grass runway but executed a go-around when it became apparent the aircraft would not stop prior to the end of the runway.
Final Landing and Runway Excursion
After the go-around, the pilot climbed to 400 feet above ground level and made a teardrop turn to align with Runway 19. The aircraft landed about halfway down the runway and ran off the end into a ditch.