It would be awesome if this rain we just got didn't wipe out all high elevation snow, unfortunately I do not think that is the case. So now we have M. U. D. 

Flows are pretty high all over the river! Visibility is pretty low all over the river. Much like the other rivers, your best bet is to tie on a gigantic stonefly nymph, maybe even with a cheeky hot bead, and an even giganticer worm fly. Or wait a few days for flows to drop. Or go to a pond and or lake. The upper Clark has been fishing well but is pretty high and off color as well right now.

BE careful when floating the Clark right now! Lots of chances for trees to come down and log jams to be created by the old bridge and dam sites from Bearmouth to town.

The Clark Fork around Missoula is running high and pushy right now, with the river carrying a lot of early-summer water. Flows are well above easy wade-fishing levels, and the river has some color from recent rain and runoff. Fishing is still possible, but this is not a casual mid-river wading situation. Anglers should be careful around the banks, avoid sketchy crossings, and focus on water that gives trout a break from the main current.

The best fishing is going to be along soft inside bends, slower bank seams, eddies, side channels, and any walking-speed water where fish can hold without burning energy. With the river up, trout are not likely to sit in the heavy middle current for long. Cover the softer edges carefully before stepping in, because a lot of fish will be tucked closer to the bank than expected.

Nymphing is the most reliable approach right now. Larger stonefly nymphs, worms, rubber-leg patterns, jig-style attractors, and darker mayfly nymphs are all good options. Fish them deep enough to get near the bottom, but do not overlook the softer buckets and shelves near the bank. Streamers are also worth a shot, especially in the slower edges and around structure. Dark or flashy patterns that push water can help fish find the fly in off-color conditions.

Bug activity is around, but the current conditions are making subsurface fishing the better bet. Caddis, PMDs, Yellow Sallies, Golden Stones, and other early-summer bugs are all becoming part of the mix, and there may be short dry-fly windows if the river settles and fish start looking up. For now, keep a dry fly rod handy, but plan on nymphs and streamers doing most of the work.

The weather pattern remains unsettled, with cool temperatures, showers, and more moisture in the forecast before a warmer window later in the week. If the rain backs off and the river starts to drop or clear, fishing could improve quickly. Until then, treat the Clark Fork as big-water fishing: stay safe, fish the margins, use enough weight, and look for slow water that gives trout an easy place to feed.