Overcast conditions and right after storms offer the best fishing. Trico spinners are most active early, with tiny BWOs and mahogany duns taking over until around noon. Terrestrial insect patterns, including those for flying ants dead-drifted in front of banks, bring trout up everywhere by midday.

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 could 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. If waters from the dam down to Last Chance become turbid, switch to using small to moderately sized nymph patterns.

Brown trout are beginning to migrate upstream in the lower river. Streamer patterns during low-light conditions are the best times to encounter them. When warming conditions come on, presenting terrestrial insect patterns close to vegetated banks will bring trout to the surface. Caddis are still active during evenings throughout the river.

Flow at Box Canyon is about 1,150 cfs, below Ashton Dam is about 1,630 cfs, and about 1,750 cfs at St. Anthony.