USA. South Dakota. Big Foot Memorial Ride. 10th day of the ride. 100 years after the assassination of Sitting Bull during the Wounded Knee massacre by the avenging American army on 29 December 1890 in South Dakota. 36 miles distance, from the North Fork of the Bad River in the Haakon County to Big Foot Pass. On the way to Big Foot Pass. Monday 24th December, 1990.