C - Swim a Spring
If you're fishing still water, use a thermometer to locate springs, which can produce water 10 degrees warmer than the rest of the lake. Submerged weedbeds are thicker in these areas, and trout will cruise them while feeding on aquatic insects. On a 20-foot leader, tie a light soft hackle on a dropper on top, a lightly weighted nymph on a dropper in the center, and a heavy nymph at the end. Make an open loop cast parallel to the weedbed (1) and swim the flies toward you very slowly (2). Gently twitching the rod tip from side to side, pausing and repeating, will trigger strikes from following fish.