Ice blocking is a recreational activity in which individuals race to the bottom of a hill sitting on large blocks of ice. In the United States ice blocking is thought to be regional, occurring in the West. The sport has a long-standing tradition at Southern Nazarene University (Bethany, Oklahoma), where the Student Government Association holds the event annually. In 2011, TLC's series Sister Wives highlighted ice blocking in the first episode of their second season. This episode showed the polygamist family spending an afternoon picnic ice blocking at a park.