Fly fishing · ID · Boise / Anderson Ranch · Tailwater

South Fork Boise River: hatch chart + live conditions

Cold tailwater below Anderson Ranch Dam. Strong midge and PMD hatches. Bull trout present; handle carefully. Excellent year-round fishing with consistent flows.

Current conditions: Checking USGS… USGS site 13185000

Top 3 dry flies for July

1
Elk Hair Caddis fly pattern
Size 12-16 · dry
Matches active hatch: caddis.
2
Stimulator fly pattern
Size 10-14 · dry
Matches active hatch: caddis.
3
Trico Spinner fly pattern
Size 20-24 · dry
Matches active hatch: trico.

Some links above are affiliate links (Amazon Associates and others). Concore Media may earn a commission at no extra cost to you. Details.

Switch to nymphs or streamers →

12-month hatch chart

YouTube

Videos

Frequently asked

What are the best months to fish the South Fork Boise River?

Best months: April, May, June, July, August, September, October.

What flies hatch on the South Fork Boise River in July?

Active hatches this month: pale morning dun, caddis, trico, terrestrial.

What species are in the South Fork Boise River?

Primary: rainbow trout, bull trout. Cold tailwater below Anderson Ranch Dam. Strong midge and PMD hatches. Bull trout present; handle carefully. Excellent year-round fishing with consistent flows.

Are there special fishing regulations on the South Fork Boise River?

No special-regulation section is listed here, so standard Idaho trout regulations apply. Check ID F&G before fishing.

How do I check live water conditions on the South Fork Boise River?

The live USGS reading is shown at the top of this page (site 13185000). It refreshes hourly.

Related

Fly recommender · All Idaho rivers · Idaho spot map · All regions · All fly patterns · Hatch guides · Gear showdowns