RedactedNarrative: Operator and passenger were heading back to rental cabin after fishing.  Operator and passenger sitting on pedestal seats.  Operating using tiller 30 hp motor, stated he was operating close to full throttle.  Operator stated this passenger turned around in her seat to face him, while she began to put away a fishing map.  Operator stated that he did not see a bend to the left from where Boulder Lake turns into the Manitowish River (operator was watching passenger put away map).  Operator ran directly into shore and struck a large pine tree head on.  Operator and passenger stayed in boat.  Front pedestal seat broke at base.  Operator and passenger struck boat interior.