Below Bonar Bridge, the Kyle divides. The left (North) stream is the main one and carries most fish. Spinning and fly fishing are allowed and the water can be fished from both banks. The Left bank can be approached from below the bridge, or from the walk, a hundred yards downstream. Be particularly careful wading here; the bottom is round, slippery stones and the current can be very fast.
From the Right bank you also have access to the mud flats. These can also be productive, although you should watch out for soft mud, particularly below the road between Ardgay and Bonar Bridge. Be careful too, when wading here – the water can drop away suddenly close to the shore.