Island?

Aerial view appears to show a wide meander at this point as the river heads sharply right (East-South-East). It appears there may be an overflow or secondary channel which continues more Northerly, which would be a more direct route if it is passable. Otherwise, the broad loop only adds 0.1 mile. (NOTE: all distances downstream are 'main channel' routing. Your mileage will vary if any cut-offs are used.)