Reply To: Madison River, Montana Home › Forums › Simpsons’ Fly Fishing Forum › Madison River, Montana › Reply To: Madison River, Montana July 21, 2015 at 1:52 am #2664 al simpsonKeymaster fished two sections today. in the afternoon, i fished the $3 bridge section, which was slow, but caught nice fish on a small, #16 purple nymph, with a soft hackle collar. in the evening, explored the Madison arm of Hebgen Lake, and caught the evening calebaetis hatch. good hatch and numerous rising fish. great fun!