Nymphbeginner

Rocky Mountain West

Copper John

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Available Sizes#12 - #20

Color Variations

CopperRedChartreuseBlack

Pattern Ledger

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Copper John

Colorado Fly Supply

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Copper John

Dette Flies

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Copper John Nymph

Schultz Outfitters

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Regional source directory

Mapped profile

Lefty Angler & Flies

Mapped tier profile for this pattern family. Confirm exact tying availability with the tier before relying on stock.

mapped tierLivingston, MT

Specialist source

Rocky Mountain Fly Design

Matched on Rocky Mountain West, nymph flies, trout. Colorado tier and shop lead for Rocky Mountain trout, bass, and predator patterns.

Rocky Mountain Westnymph flies

Regional shop

Taos Fly Shop

Matched on Rocky Mountain West, nymph flies, trout. New Mexico/Southwest trout shop lead for Rio Grande, San Juan, Pecos, and high desert water.

Rocky Mountain Westnymph flies

Specialist source

Stillwater Fly Fishing Store

Matched on Rocky Mountain West, nymph flies, trout. Specialist stillwater source for balanced leeches, chironomids, and lake-trout logic.

Rocky Mountain Westnymph flies

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John Barr created this nymph in Colorado, and it has been outfishing local knowledge ever since. The copper wire body flashes in the current like a tiny disco ball for trout. Tungsten bead gets it to the bottom where the trout actually live, as opposed to the surface where your ego wants to fish.

Meet the Tier

Satoshi Yamamoto

Lefty Angler & Flies

Livingston, MT

A published author and pro staff tier for Regal Vise and Whiting Farms, Satoshi approaches fly tying with scientific precision. His spring creek close imitations are works of technical art.

Pro staff Regal Vise & Whiting Farms, published author, BFFI presenter

Visit Tier Site Search More Tiers

Quick Facts

TypeNymph

Difficultybeginner

SeasonsSpring, Summer, Fall, Winter

Target SpeciesRainbow Trout, Brown Trout, Mountain Whitefish

Sizes#12 - #20

Best LocationsSouth Platte River, CO; Frying Pan River, CO; Big Horn River, MT

Where to Fish It

South Platte River

CO · Tailwater

Frying Pan River

CO · Tailwater

Big Horn River

MT · Tailwater

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Related Reading

region guide

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How Trout See Your Fly: The Science of Color and Light

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Reading Stream Gauges: Flow Data for Better Fishing

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Nymph or Dry? The Decision That Changes Everything

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Catch and Release: The Science of Fish Survival

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