BOSTON — Boston will toast the World Series champion Red Sox with a duck boat parade Saturday, Mayor Thomas Menino and team officials announced Thursday, giving fans an opportunity to revel in the improbable success of a team that finished in last place just one season ago.

Players will climb aboard the amphibious vehicles inside Fenway Park at 10 a.m. for the so-called rolling rally, officials said.

The parade route, the same as the one used in 2004 when the Red Sox won their first World Series title in 86 years, will travel down Boylston Street, where in April two bombs killed three people and injured more than 260 others at the finish line of the Boston Marathon.

Red Sox officials said the parade was not merely an opportunity for fans to thank the team but also for the team to show its appreciation to the city, and they expected most, if not all, of the players to participate.

Organizers said they wanted to hold the parade Saturday so as many fans as possible could attend, especially families with children.

The Red Sox defeated the St. Louis Cardinals 6-1Wednesday to take the series in six games.