Tight-line nymphing through slower waters makes a good strategy because of increased flows through Box Canyon. Overcast conditions, which have been frequent recently, offer the best fishing with early AMs best. Tricos are most active early, with tiny BWOs taking over around noon. Terrestrial insect patterns, including those for spruce moths and flying ants, dead-drifted in front of banks bring trout up everywhere by mid-day.

Because the water level in the Reservoir is below what it takes for the dam power plant to operate fully, outflow will be shifted to the gates. Thus turbidity will increase, with algae mats and other plant material entering the river below. This situation will continue through September when water storage returns to levels allowing the power plant to operate.

From Warm River downstream, summer heat makes early and late in the day the best time to fish. PMDs are becoming much less numerous as summer rolls on, but tiny BWO, mahogany dun, and trico activity is beginning. Late in the day, caddis activity brings fish up. Weed growth can be dense in slower waters. Try a streamer pattern of choice during low-light conditions. Flow at Box Canyon is about 1,200 cfs, below Ashton Dam is about 1,170 cfs, and about 1,820 cfs at St. Anthony.