Fly Line Types Guide: WF, DT, Running & Shooting Heads

01Understanding Fly Line Fundamentals

Fly lines represent the heart of any fly fishing system, serving as the crucial connection between angler and fish. Unlike conventional fishing where weight comes from sinkers or lures, fly fishing relies entirely on the weight forward design of the line to deliver flies to their target. Understanding the four primary line types—weight forward (WF), double taper (DT), running lines, and shooting heads—enables anglers to optimize their presentation for specific fishing scenarios and target species.

"The right fly line can transform an average cast into a perfect presentation, while the wrong line can handicap even the most skilled angler."

Scientific Anglers, a leading manufacturer, emphasizes that proper line selection affects casting distance, accuracy, and fly presentation more than any other equipment component. This comprehensive guide examines each line type's characteristics, applications, and optimal fishing scenarios.

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02Weight Forward (WF) Lines: The All-Purpose Champion

Design and Construction

Weight forward lines feature a concentrated mass in the front 30-40 feet, tapering to a thinner running line behind. This design creates three distinct sections:

• Head: The weighted front section containing the taper and belly
• Taper: Gradual transition from thick belly to thin front taper
• Running Line: Thin diameter shooting line extending to the reel

The weight distribution allows for easy loading of modern fast-action rods and facilitates long-distance casting. Most weight forward lines measure between 85-105 feet in total length, with the heavy section comprising roughly one-third of that distance.

Casting Performance

Weight forward lines excel in distance casting due to their front-loaded design. The concentrated weight loads the rod quickly during the false cast, generating higher line speeds and longer carrying distances. This makes WF lines ideal for:

• Large rivers requiring distance casting
• Windy conditions where line mass overcomes resistance
• Saltwater applications targeting tarpon, permit, and bonefish
• Streamer fishing for brown trout and rainbow trout

Anglers fishing waters like Snake River or Missouri River benefit significantly from weight forward lines' casting advantages.

Versatility and Applications

Weight forward lines serve as the most versatile option for diverse fishing scenarios. The design accommodates both delicate dry fly presentations and aggressive streamer fishing. Specialty WF tapers include:

• Presentation Taper: Longer, more gradual front taper for delicate presentations
• Bass Taper: Shorter, more aggressive taper for turning over large flies
• Saltwater Taper: Tropical core with enhanced durability for warm-water species
• Nymphing Taper: Modified weight distribution for indicator fishing

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03Double Taper (DT) Lines: Precision and Delicacy

Traditional Design Benefits

Double taper lines maintain consistent diameter throughout their length, tapering equally at both ends. This symmetrical design, measuring typically 90 feet, offers unique advantages for specific fishing applications. The uniform thickness provides:

• Superior line control during mending operations
• Delicate presentations on spring creeks and technical waters
• Extended line life through end reversal capability
• Enhanced accuracy at moderate distances

Ideal Fishing Scenarios

Double taper lines shine in situations requiring finesse over distance. Silver Creek and DePuy Spring Creek represent classic double taper venues where fish scrutinize presentations closely. These lines excel when:

• Fishing to selective trout with BWO Comparaduns and trico patterns
• Working small streams where casting room is limited
• Presenting dry flies during complex hatches
• Nymphing with minimal drag in technical water

Modern Applications

While less popular than historically, double taper lines remain valuable for specialized applications. Rio Grande continues producing DT lines specifically for spring creek and small stream fishing. Modern double tapers incorporate advanced materials while maintaining traditional characteristics. Experienced anglers often prefer double taper lines when targeting educated fish in pressured waters. The consistent diameter allows for subtle line manipulation and superior mending control, crucial when fishing complex currents.

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04Running Lines: Specialized Distance Tools

Construction and Purpose

Running lines serve as the backing portion of shooting head systems, designed specifically for maximum shooting distance. These thin-diameter lines typically measure 0.024-0.035 inches and extend 100+ feet. Two primary types exist:

• Monofilament Running Lines: Low-friction nylon or fluorocarbon construction
• Coated Running Lines: Thin fly line with PVC coating for handling comfort

Performance Characteristics

Running lines excel in specific applications requiring maximum distance or specialized techniques:

• Spey Casting: Essential for steelhead and Atlantic salmon fishing
• Indicator Nymphing: Minimal diameter reduces water resistance
• Competition Casting: Achieves maximum distance in casting competitions
• Large Water Applications: Ideal for fishing expansive waters like Yellowstone Lake

Handling Considerations

Running lines require specific handling techniques due to their thin diameter. Memory coils develop easily in cold weather, and tangles occur more frequently than with standard fly lines. Successful running line use demands:

• Proper line management through stripping baskets or shooting heads
• Regular stretching to minimize memory
• Careful storage to prevent kinking
• Quality connections to shooting heads or leaders

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05Shooting Heads: Ultimate Distance and Versatility

System Components

Shooting head systems combine short, weighted head sections (24-40 feet) with thin running lines. This modular approach allows anglers to interchange heads for different fishing conditions while maintaining the same running line. Components include:

• Shooting Head: Weighted front section determining casting characteristics
• Running Line: Thin shooting line extending to the reel
• Connection System: Loop-to-loop or welded connections between components

Advantages in Specific Applications

Shooting heads provide maximum versatility for anglers fishing diverse conditions. Airflo produces specialized shooting heads for every application, from delicate spring creek fishing to aggressive saltwater presentations. Key advantages include:

• Quick Changes: Adapt to changing conditions without re-rigging
• Specialized Tapers: Heads designed for specific fly types and fishing styles
• Distance Casting: Achieves maximum casting distances in open water
• Compact Storage: Multiple heads occupy minimal space

Head Selection Strategies

Successful shooting head fishing requires matching heads to specific conditions and target species. Consider these factors when selecting heads:

• Density: Floating, intermediate, or sinking rates for different water columns
• Taper: Aggressive tapers for large flies, delicate tapers for small presentations
• Length: Shorter heads for quick loading, longer heads for smoother casting
• Weight: Match head weight to rod specifications for optimal loading

Anglers targeting northern pike on Lake Pend Oreille might carry floating, intermediate, and fast-sinking heads to cover different water depths throughout the day.

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06Line Selection for Different Fishing Scenarios

Small Stream Fishing

Small streams and creeks demand precise presentations in confined spaces. Cheaha Creek and similar intimate waters favor:

• Double Taper Lines: Superior accuracy and delicate presentations
• Short Weight Forward Lines: Easier handling in tight quarters
• Light Line Weights: 3-4 weight lines for minimal disturbance

When pursuing brook trout with Little Black Stonefly patterns, double taper lines provide the control necessary for accurate placement.

Large River Applications

Expansive waters like Bighorn River and Arkansas River require different approaches:

• Weight Forward Lines: Essential for distance casting and wind penetration
• Shooting Heads: Maximum distance for covering extensive water
• Heavier Line Weights: 5-6 weight lines for larger flies and stronger currents

Streamer fishing for large brown trout with Woolly Buggers benefits from weight forward lines' casting power and versatility.

Saltwater Considerations

Saltwater fly fishing demands specialized line characteristics for species like redfish and striped bass:

• Tropical Core Lines: Resist memory in warm climates
• Aggressive Weight Forward Tapers: Turn over large, wind-resistant flies
• Intermediate Sinking Lines: Fish subsurface without excessive depth

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07Advanced Line Selection Considerations

Rod Action and Line Matching

Proper line selection requires understanding rod action characteristics. Fast-action rods prefer weight forward lines for efficient loading, while moderate-action rods cast better with double taper lines' gradual energy transfer. Orvis emphasizes this matching principle in their rod and line recommendations.

Environmental Factors

Environmental conditions significantly influence line choice:

• Wind: Weight forward lines penetrate wind more effectively
• Water Temperature: Cold water requires lines with minimal memory
• Altitude: High-altitude fishing benefits from slightly heavier line weights
• Water Clarity: Clear water demands delicate presentations favoring double taper lines

Fishing Fryingpan River during winter requires lines specifically designed for cold-weather performance.

Species-Specific Considerations

Different species demand varying presentation styles:

• Arctic Grayling: Delicate presentations with double taper lines
• Muskie: Heavy weight forward lines for large flies and fighting power
• Mountain Whitefish: Versatile weight forward lines for varied techniques

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08Maintenance and Care

Cleaning and Storage

Proper line maintenance extends life and maintains performance. Cortland Line Company recommends regular cleaning with specialized line cleaners and proper storage techniques:

• Clean lines after every use in saltwater or dirty conditions
• Store lines in loose coils to prevent memory
• Apply line dressing to maintain flotation and casting performance
• Inspect regularly for nicks, cracks, or coating damage

Replacement Indicators

Recognize when lines require replacement to maintain optimal performance:

• Visible cracking or coating separation
• Permanent memory coils that won't straighten
• Reduced floating capability in floating lines
• Significant color fading indicating UV damage

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09Making the Right Choice

Selecting appropriate fly lines requires balancing multiple factors: fishing environment, target species, casting requirements, and personal preferences. Weight forward lines provide the most versatility for diverse fishing scenarios, making them ideal for anglers fishing multiple water types. Double taper lines excel in technical situations requiring delicate presentations, while running lines and shooting heads serve specialized distance applications. Beginners should start with quality weight forward lines matched to their rod specifications. As skills develop and fishing scenarios diversify, additional line types can expand presentation options. Remember that line selection represents an ongoing learning process—even experienced anglers continue refining their choices based on conditions and target species. For comprehensive information on matching lines to specific waters, explore our state-by-state fishing guides and species-specific recommendations. Understanding how different line types perform in various scenarios will significantly improve your fly fishing success and enjoyment on the water.

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10Sources & References

• Scientific Anglers - Fly Line Technology
• Rio Grande - Line Selection Guide
• Airflo - Shooting Head Systems
• Orvis - Rod and Line Matching
• Cortland Line Company - Line Care and Maintenance
• Fly Fisherman Magazine - Line Selection Techniques