Super Bowl XXIX.
The last Super Bowl was in 1985 in a loss to the 49ers 16-38
The 49ers' last Super Bowl appearance was on January 29, 1995. They defeated the San Diego Chargers 49-26 in Super Bowl XXIX.
The last time the San Francisco 49ers won the Super Bowl was on January 29, 1995. They defeated the San Diego Chargers in Super Bowl XXIX by the score of 49-26.
Through Super Bowl XLIII, that was Super Bowl XXIII played January 22, 1989 against the San Francisco 49ers. The 49ers won 20-16.
Super bowl xxix was the only time they made it and lost to the San Francisco 49ers.
As of the 2007 season, the last Super Bowl the 49ers won was SB XXIX played January 29, 1995. They defeated the San Diego Chargers 49-26.5
1994 against the San Francisco 49ers
i want to say '85 . against the 49ers .