Browse Idaho Fishing Reports

Covers Aug 26–Sep 2

Low, clear water makes the Big Lost accessible but demands stealth and smart timing. Fish the morning window hard when Tricos and small mayflies are active.

Flows are moderate and dropping into a comfortable range, with Mutant Stones and small stoneflies active. Overcast skies and light turbidity near the source make for solid midsummer fishing downstream.

Covers Aug 19–26

The Big Lost is running low and clear, with morning mayfly hatches and strong nymph fishing through the week. Focus on the main stem as the North Fork recovers from recent muddy conditions.

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.

Fast, elevated flows push the South Fork's fish tight to cover, making float fishing the smart play. Grasshoppers and terrestrials lead the daytime bite, but expect a short productive window before afternoon heat and smoke shut things down.

Flows have dropped to 693 cfs, improving wading. Golden Stones and Gray Drakes are active in Box Canyon, while the middle Ranch and lower sections offer solid fishing with multiple mayflies and terrestrial opportunities.

Covers Aug 5–12

The Big Lost is dropping into low-flow summer conditions and fishing despite angler pressure. Expect hatch activity through the morning and afternoon, with both dry-fly and nymph opportunities. Move frequently to find fish that haven't seen multiple casts.

Summer conditions are prime on the South Fork with multiple hatches active and stable flows around 5,950 cfs. Dry flies and nymphs both work—pair them strategically through the Palisades to Heise stretch.

August fishing on the Henrys Fork rewards early starts. Stable, moderate flows and low-70s water temps create solid conditions if you time your approach. Focus on cooler water near springs and shaded runs; small dries work well in the morning and evening hours.