 The canon is about three-quarters of a mile long and very deep; its floor and sides are covered with an exceptionally luxuriant growth of trees, shrubbery, and flowers.This exceptional vegetation is produced by the flow of Cascade creek through the canon and the mist and spray from its falls.Some of these falls are as much as 30 feet in height, but the difference in elevation between the foot and the head of the canon is so great that the falls are almost continuous from the head down.