The Red Lake and Pembina bands of Ojibwe sign the Old Crossing treaty, ceding to the US government three million acres of land in the Red River Valley. Senator Alexander Ramsey and Indian Agent Ashley C. Morrill represent the United States; Moose Dung, Crooked Arm, Little Rock, and Little Shell are among the Ojibwe signers. The treaty is named for a ford in the Red Lake River, near Red Lake Falls.

The St. Paul Dispatch runs a photograph of all the automobiles owned by city residents: two cars and two trucks.

Congress passes the National Wild and Scenic Rivers Act, naming the upper St. Croix River one of eight rivers protected by this legislation. The lower fifty-two miles of the river are preserved on October 25, 1972.

The Minnesota Historical Society is incorporated by an act of the territorial legislature, and Alexander Ramsey is elected its first president.

The brothel of St. Paul's most famous madam, Nina Clifford, is demolished after fifty years of business at 147 Washington Street.

The US War Department orders Edward Janes, Wisconsin territorial marshal, to expel the Selkirk squatters from Fort Snelling military reservation. The fort's commander had complained of the settlers selling whiskey to the soldiers.

The Minnesota North Stars professional hockey team plays its first home game, beating the California Seals 3-1.

"General" James Dickson and a group of filibusters arrive at Fond du Lac. They plan to form an army of Métis people in the Red River area, march to California and capture it from Mexico, and establish a kingdom ruled by Dickson. The group travels as far as Pembina before being broken up by employees of the Hudson's Bay Company.

Actress Ethel Barrymore appears in the play Sunday, which runs through October 25 in St. Paul.

Minnesota residents Jeannette and Jean Piccard ascend in a hydrogen balloon to a record 57,579 feet. Jeanette made a total of six trips into the stratosphere and later served as a consultant for NASA.

Duluth mayor John Fedo goes on trial, charged with accepting a bribe and misusing city money. He was later acquitted.