A glide, or flat, is a section of slow, smooth water. Most are a few feet deep, but some glides are quite shallow and are smooth because of the slow water speed and smooth stream bed. Glides can be very difficult to dry-fly fish and often require very long and light leaders. The smooth, slow water allows the fish to get a clear and close look at a dry fly. Wading quietly is critical because of the surface smoothness and lack of natural water noise.