Browse Idaho Fishing Reports

Late summer has the South Fork dropping fast, with flows at 3,590 cfs and water temperature holding at 65°F. Mutant stones, Mahoganies, and Blue-winged Olives are hatching, with hoppers effective in afternoons.

Cool water from Island Park Reservoir and moderate flows favor eager fish. Mahogany duns are hatching and big rainbows are on the move.

Clear water and dropping flows are opening up better wading on the flatwater. Start with small nymphs and switch to terrestrials as the day warms.

Covers Aug 26–Sep 2

Low, clear water through early September demands stealth but rewards mobile anglers with good midmorning dry-fly fishing in runs and edges. Plan your day around morning Tricos and Baetis, and expect slow afternoon action.

Covers Aug 19–26

Expect morning Trico and Baetis hatches on the main stem with temporary off-color water from the seasonal turnover; nymphing and subsurface tactics will produce once the hatch clears. Morning temperatures are chilly, so fishing improves as the day warms.

Summer hatches are firing on the South Fork with Mutant Stones, PMDs, Yellow Sallies, caddis, hoppers, and terrestrials. Water temps at 66°F support both dry and nymph patterns.

Clear water and stable flows are opening up wading on the Henrys Fork, with strong terrestrial and PMD hatches through the day into evening.

Clear water and eased flows have dramatically improved wade access on the Henrys Fork, with PMD hatches dominating midday and terrestrials active throughout the afternoon.

Flows are stable around 6,000 cfs with cooling conditions and rain on tap. PMDs, Blue-Winged Olives, and terrestrials should draw fish.

Covers Aug 12–19

Low flows make the Big Lost challenging but rewarding for anglers willing to fish small and precise. Morning Tricos give way to hoppers and selective mayfly patterns as the water warms.

Multiple summer hatches, Mutant Stones, PMDs, Yellow Sallies, and Caddis, are active on the South Fork, with stable flows around 5,950 cfs and comfortable 67°F water. Both dry and nymph tactics are worth exploring.

Clear water and stable conditions make the Henrys Fork fishable on August 8, with best dry fly action early before heat and afternoon winds build.

Smallmouth bass are the draw here, with rocky shorelines holding fish that respond well to crawfish and baitfish patterns on sink-tip setups.