Tour de Trossachs. Start on A81 about 1.5 miles from Aberfoyle. Take left at roundabout on A821 through Aberfoyle for Calander. Take right for Invertrossachs Road to join A81 turn right for Thornhill. Take left on B822 for Thornhill. At Thornhill take right on A81 for Aberfoyle to finish 1 mile from Rob Roy Motel.