Island Park / Ashton
Fall River
Live Conditions
Fall River — Near Squirrel
7-Day Flow
↓ Falling
24-Hr Pressure
24.76 inHg · → High/stable
Local Weather
Tough conditions — fish deep
Today
☀️Clear sky
85° / 55°
Tomorrow
☀️Clear sky
76° / 49°
Tue
☀️Clear sky
78° / 48°
Wed
☁️Overcast
88° / 49°
Cold front incoming — go deep with nymphs, surface activity likely slow.
Weather by Open-Meteo · No API key · Updated every 30 min
What should I fish today?
⚡ AIAI-powered recommendation using today's live flow, temperature, and hatch data.
9
Time of Day
Using: 435 CFS · PMDs continue. HOPPER SEASON peak
What should I pack?
Rod, flies, tippet, and safety gear specific to today's Fall River conditions.
🪰 Hatch Calendar
Fall River · August · Late Summer
Showing typical dates — water temperature data unavailable for live hatch predictions.
Select month
PMDs continue. HOPPER SEASON peak (size 8-12). Caddis evenings. Terrestrials productive. Quiet alternative to Henry's Fork — equally good fishing, fewer anglers.
River Map
About Fall River
Tributary of Henry's Fork flowing out of Yellowstone's Bechler region into Ashton Reservoir. Wild cutthroat, browns, and rainbows in a less-pressured setting just south of the Henry's Fork itself.
Regulations
Standard Idaho trout regulations apply on Fall River; rainbow trout are the primary species. Idaho fishing license required. Verify current regs at idfg.idaho.gov before fishing.
Learn More
Guides to help you fish Fall River with more confidence.
Idaho Fishing Regulations for Fly Anglers
Idaho's generous six-trout general limit — and the strict river-specific exceptions that override it. Licenses and the steelhead/salmon permits, bull…
Trout Species of Idaho
Idaho's six defining salmonids — the famous wild Henry's Fork rainbows, native westslope cutthroat of the St. Joe/Lochsa/Selway, federally threatened…
Silver Creek, Idaho: The West's Most Technical Spring Creek
Silver Creek near Picabo, Idaho is a spring creek of exceptional clarity and difficulty — flat, clear water with large, selective brown and rainbow…