From Cardiac Canyon downstream to Chester backwaters and a bit later in Box Canyon big stonefly nymphs are moving toward banks or already there. Soon there will be enough of them flying over the river to drop eggs, and drifting that trout will respond with rises to the surface to take them. We have a number of patterns that are excellent imitations for these insects as well as the tackle to present them. Patterns include such as Chernobyl, CFO, and stimulator variations to old stand-by sofa pillows and Bird’s Stones. Because of conditions on the South Fork, expect crowds wherever you try your luck on the river during this event.