Some consider The Anvil the crux of Second Canyon. It has never felt that way for me. Perhaps it's different for rafters or at a different water level. Anyway, The Anvil starts with a long wave train of laterals and holes before pouring through a narrow constriction plugged by a large boulder (the anvil). This block forms a meaty hole at higher water. A very turbulent gap on the left is the normal line but beware of the left wall, known as the Velcro Wall. Second Canyon opens up immediately downstream.