The river is very high right now as we are neck deep in the second week of "true runoff"! However, this is the best local option when it comes to the larger rivers. Nymph near the bank, along the weed beds and buckets with plenty of weight! This is the time to fish those Crayfish Patterns and trail them with a Caddis Pupa or Stonefly Nymph (San Juan's too)!
Mother's Day Caddis are out (along with a handful of March Browns and small Stoneflies) right now but the flows have come WAY up since a couple of days ago. Expect to see some off-color water conditions and difficult wading at this point. However, there are enough bugs out to bring fish to the surface at different points during the day.
Dead Drift Crayfish
Black Pat's Rubberleg
Read the "Lower Madison River Fishing Guide" for a comprehensive introduction to fly fishing in Montana on the lower Madison River from the Bozeman fly fishing guides with Fins and Feathers.