Current Conditions

Flow Rate
211 cfs
Trend Trend
🔴Dropping Fast - ≤ -30%
🟠Dropping - -10% to -30%
🔘Stable - -10% to +10%
🔵Rising - +10% to +30%
🔴Rising Fast - > +30%
-5%

Flow data from USGS, USBR .

Hatch Guide for Snake River - Flagg Ranch

Gear Recommendations

ROD 5-6wt
LEADER 9ft , 3X-4X taper
TIPPET 3X-5X
INDICATOR Thingamabobber or foam
RIG Indicator nymph (2-fly)
Fish: 12-18 inches avg

⚠️ REGULATIONS

Snake River, South Entrance of Yellowstone National Park downstream through the John D. Rockefeller Jr. Memorial Parkway to Jackson Lake — Wyoming Game & Fish Area 1 regulations (2026 brochure, item 13): no blanket gear restriction; standard Area 1 stream limits apply (3 trout per day, no more than 1 exceeding 16 inches, no more than 1 cutthroat trout exceeding 12 inches). All cutthroat trout must be released immediately November 1 through March 31. Live baitfish prohibited. Although this reach lies within the JDR Parkway (between Yellowstone and Grand Teton), the Snake River proper is explicitly named as an exception to the Parkway's closure and artificial-only rule, and — unlike Yellowstone National Park itself — Parkway/Grand Teton water is governed by Wyoming state fishing law and a standard WY license, not a separate NPS fishing permit. Valid Wyoming fishing license required. See https://wgfd.wyo.gov/regulations.

View official Wyoming regulations →

*Verify current regulations before fishing. Rules may change.

Map Snake River - Flagg Ranch

Nearby Rivers to Fly Fishing Snake River – Flagg Ranch

Fish Species

Fly Fishing Snake River - Flagg Ranch

Overview

The Snake River in Teton country carries cutthroat trout and mountain whitefish through gravel-bottomed runs, willow margins and changing channels. Side currents and deeper seams provide distinct holding lies within a broad valley landscape. Short, controlled presentations help cover the water beside a bar or vegetated bank.

Braids and Bank Cover

Snowmelt and reservoir releases influence different reaches of the Snake. At the chosen lie, study the depth and current before placing a cast. A soft edge can sit beside a strong main channel, and gravel bars and bank-side seams can shift as water levels change.

Pale morning dun, caddis and blue-winged olive imitations offer choices when those insects or rising fish are visible. Golden stonefly and Yellow Sally patterns broaden the searching box. Hoppers and ants offer terrestrial options beside willows and grassy margins during warmer weather.

A dry-dropper can cover a riffle seam and the water beneath it, while a smaller dry fits a deliberate feeding rhythm in a slower run. Keep the first cast short and let the fly enter the chosen current before extending the drift. The Snake’s varied channels reward close observation of an individual holding lie.