A portion of Riverfront Drive in Mankato will be closed (Thursday) morning for the annual Dakota 38-plus-two Memorial Ride. Event organizers say the ride honors the 38 Dakota Warriors executed in Mankato in 1862 and two more being hung in 1864. Mankato Public Safety says the ride begins at Land of Memories Park at nine a.m. and will continue onto Highway 169 to the First exit onto the northbound lane of Riverfront Drive. Authorities say once at the monument site in Reconciliation Park, the northbound and southbound lanes of North Riverfront Drive, between Main and Plum Streets, will be closed for approximately two hours.