Idaho Fishing Reports ยท Upper Snake Region
The lower Henrys Fork around St. Anthony is a big, open river with brown trout and rainbows and fewer anglers than the upper river.
Looking for the latest Lower Henrys Fork river report? This page is updated by the AvidMax fly shop team with live flows, current conditions, hatches and the flies working now on the Lower Henrys Fork (St. Anthony).
Current flows
Wind forecast
Lower Henrys Fork fishing report
Updated November 7, 2026.
Flows are moderate and clear, and brown trout are active in the fall.
Swing or strip streamers along the banks and nymph the riffles.
Load your fly box
Before you head to St. Anthony, bring: Woolly Bugger #4-8, Sculpin #4-6, Pat', s Rubber Legs #6-10, Pheasant Tail Nymph #14-16, Zebra Midge #18-22, Parachute Adams #16-20, RS2 Emerger #18-22, JuJu Baetis #18-22, Black Beauty #20-24, Egg #14-16.
Flies working right now
The flies above that we have in stock right now.
Lower Henrys Fork details
| Access | Access sites and bridges around St. Anthony, Chester and Parker. |
|---|---|
| Elevation | About 4,900 ft |
| Nearest town | St. Anthony, Idaho |
| Best season | Year-round |
| Fish | Brown and rainbow trout, whitefish |
| Regulations | Check the Idaho Department of Fish and Game seasons and rules before you go. An Idaho fishing license is required for anglers 14 and older, plus a steelhead or salmon permit where those fish are targeted. |
| Leaders and tippet | 9 ft leaders, 2X to 4X tippet |
| Camping | Private campgrounds near St. Anthony |
| Kids | Partly. |
| Good to know | Irrigation diversions change flows quickly in summer. |
Fishing by season
Winter
Midges and quiet days.
Spring
Caddis and BWOs.
Summer
Hoppers and caddis.
Fall
Browns on streamers.
How to get there
From Idaho Falls, take US-20 north to St. Anthony.