BEFORE MAKING AN APPROACH AND LANDING AT THE UNCONTROLLED AIRPORT, THE PILOT OVERFLEW THE RUNWAY TO CHECK THE WIND SOCK. HE ELECTED TO LAND ON RUNWAY 23, WHICH WAS 2103 FEET LONG. DURING THE LANDING ROLL, THE AIRPLANE OVERRAN THE END OF THE RUNWAY, AND THE LEFT MAIN LANDING GEAR COLLAPSED. THE WIND WAS 060 AT 12 KNOTS. THE PILOT STATED THAT HE MISREAD THE WIND SOCK.