The pilot of the float-equipped airplane reported that, during takeoff from a lake, after the floats came up on the step, the right float struck a submerged bog or tundra which resulted in a brief deceleration of speed. After the float cleared the submerged bog, the airplane accelerated again, but the airspeed was not sufficient for liftoff, so the pilot aborted the takeoff. As the airplane approached rocks at the north edge of the lake, he steered the airplane to the right onto a mud embankment and slid to a stop short of the adjacent airport's taxiway.

The airplane sustained substantial damage to the fuselage.

The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.