Porcupine Butte is a mountain summit located on the Pine Ridge Indian Reservation in Oglala Lakota County, South Dakota. Porcupine Butte is 3,665 feet above sea level. The nearest municipality to Porcupine Butte is Wounded Knee, 2.3 miles away. KILI Radio, 90.1 FM maintains their broadcast facilities at Porcupine Butte, with the transmit tower locateā¦Porcupine Butte is a mountain summit located on the Pine Ridge Indian Reservation in Oglala Lakota County, South Dakota. Porcupine Butte is 3,665 feet above sea level. The nearest municipality to Porcupine Butte is Wounded Knee, 2.3 miles away. KILI Radio, 90.1 FM maintains their broadcast facilities at Porcupine Butte, with the transmit tower located on the butte. There is also a fire watchtower located at the top of the butte. BIA Highway 27, also known as Big Foot Trail passes by the butte.