Disclaimer: The following report is compiled using artificial intelligence from current available data. Accuracy is not guarenteed. Always check local laws and regulations before fishing.

The South Fork Snake River in Swan Valley meanders through Idaho's rugged Teton Range foothills, featuring crystal-clear waters and riffles that hold abundant trout in a scenic, high-desert landscape.

Overall Fishing Conditions

With warm summer weather reaching a high of 89°F and steady SSE winds, expect good trout activity in slightly above-average flows around 12,300 ft³/s, though afternoon thunderstorms could stir things up; I'd rate the conditions an 8 out of 10 for solid opportunities despite potential wind challenges.

Insect Hatches and Their Timing

Late July hatches should include Pale Morning Duns and caddis in the afternoons and evenings as water temperatures hover around 49°F. Hoppers might appear near banks during midday with the sunny forecast.

Species to Target

Focus on rainbow trout, which are plentiful and feeding aggressively. Brown trout could also be active in deeper pools, especially with the waxing crescent moon boosting nighttime insect activity.

Top 5 Fly Patterns to Use

• A size 14-16 PMD dry fly for matching afternoon hatches.
• An Elk Hair Caddis in size 14 for evening caddis activity.
• A size 10 Hopper pattern for bank fishing during windy conditions.
• A Beadhead Pheasant Tail nymph in size 16 for subsurface action.
• A Woolly Bugger in black, size 8, for trolling deeper runs.

Best Times of Day to Fish

Early mornings around sunrise will offer calm waters and rising fish. Late evenings near moonrise at 15:37 will align with hatches and cooler temperatures. Midday might be less productive due to heat and winds, so seek shaded areas.