Human-Powered Travel in Wilderness Areas Act This bill requires the Department of Agriculture and the Department of the Interior to authorize their respective local offices to determine all permissible forms of nonmotorized travel over routes within wilderness areas. Local offices must seek to accommodate all forms of nonmotorized travel to the maximum extent practicable. If a local office fails to make such a determination about a route within two years after this bill's enactment, then any form of nonmotorized travel shall be allowable on that route.