Fishing by “trolling” is a dynamic and effective method of angling where one or more fishing lines, baited with lures or live bait, are drawn through the water behind a moving boat. The goal is to entice fish to strike by presenting the bait in a way that mimics natural prey swimming or fleeing. This technique is incredibly versatile and can be effective for a wide range of species, from freshwater trout to massive offshore marlin.
The Fundamentals of Trolling
At its core, successful trolling involves a careful balance of speed, depth, lure selection, and boat control. Mastering these elements is crucial for consistent success.
1. Boat Speed
This is perhaps the most critical factor in trolling. The ideal trolling speed varies greatly depending on the species targeted, the type of lure being used, and the current water conditions.
- Slow Trolling (0.5 – 2 mph): This speed is often used for delicate live bait presentations, especially for finicky fish like walleye or certain salmon species. It allows the bait to move naturally and gives fish ample time to inspect it, often triggering strikes from less aggressive feeders.
- Medium Trolling (2 – 5 mph): This is a common and versatile range for many artificial lures, such as crankbaits, spoons, and some soft plastics. This speed imparts a good, enticing action to the lure, making it highly attractive to a wide variety of predatory fish.
- Fast Trolling (5 – 10+ mph): Employed for specific high-speed lures, particularly in offshore environments for species like marlin or tuna, or when covering vast areas quickly to locate active fish. This speed creates a significant disturbance in the water, which can attract aggressive, pelagic predators.
Experimentation is key. Consistently observe how your lure is behaving at different speeds. Watching your rod tips for a consistent “wobble” or vibration will indicate proper lure action. A sudden cessation of this action might mean your lure has fouled or picked up debris.
2. Depth Control
Getting your bait to the correct depth is paramount, as fish often congregate at specific depths based on factors like water temperature, structure (e.g., reefs, drop-offs), the presence of baitfish, and light conditions. Several methods are used to achieve desired depths:
- Line Weight/Lure Weight: This is the simplest method. Heavier lures and heavier fishing line will naturally sink deeper due to their increased mass.
- Line Diameter: Counterintuitively, thicker line creates more drag in the water, which can actually reduce the diving depth of some lures, especially those designed to dive based on water resistance.
- Diving Lures: Many crankbaits are specifically designed with a prominent lip or bill that causes them to dive to a predetermined depth when trolled. The size, shape, and angle of this lip directly influence the lure’s maximum diving depth.
- Downriggers: These mechanical devices offer unparalleled precision in depth control. They allow you to precisely lower a heavy weight (called a “cannonball”) to a specific depth. Your fishing line is then clipped to a downrigger release, which holds the line until a fish strikes, at which point the line pops free, allowing you to fight the fish directly on your main line. Downriggers are excellent for targeting species like salmon, trout, and many offshore game fish that hold at specific depths.
- Planer Boards (Outriggers for Offshore): These devices are designed to pull your fishing line out to the side of the boat, effectively spreading out your fishing lines and preventing tangles, especially when running multiple lines. In some cases, they can also help achieve a slightly different depth than lines trolled directly behind the boat by changing the angle of the line’s entry into the water. For offshore trolling, outriggers serve a similar purpose, spreading baits widely to cover more water and create a larger “spread.”
- Diving Planers/Dipsy Divers: These are disc-shaped or winged devices that attach directly to your main line and are designed to dive to a specific depth, pulling your lure down with them. They are a popular choice when downriggers are not available or when a simpler, more portable depth-control method is desired.
- Lead Core Line: This unique type of fishing line has a lead core encased within a braided or nylon sheath. The lead adds significant weight, causing the line and the attached lure to sink. Lead core lines are typically color-coded in segments (e.g., 10 yards per color), allowing for approximate depth calculations based on the number of colors deployed and the trolling speed.
3. Lure Selection
The choice of lure is critical and should always be tailored to the target species, prevailing conditions, and the forage base in the water.
- Crankbaits: These versatile lures mimic baitfish and are available in an astounding variety of sizes, colors, and diving depths. They are highly effective for freshwater species like bass, walleye, pike, and even some inshore saltwater species.
- Spoons: Metal lures characterized by their wobbling and flashing action, which effectively imitates injured baitfish. Spoons are exceptionally effective for salmon, trout, pike, and various saltwater game fish.
- Plugs/Hard Baits: A broad category that includes many offshore trolling lures. Similar to crankbaits but often larger and more robust, designed specifically for bigger game fish like tuna, wahoo, and marlin. Some have flat or angled heads to create a significant “smoke trail” and commotion in the water.
- Soft Plastics: While often associated with casting or jigging, soft plastic worms, grubs, and swimbaits can be effectively trolled, often with added weight (e.g., a jig head or sinker) to achieve desired depths.
- Flasher/Dodger Combos: These are not lures themselves but are powerful attractants. Flashers rotate or oscillate to create continuous flash and vibration, while dodgers have a more erratic, side-to-side swimming motion. Both are typically rigged a short distance in front of a spoon, fly, or small bait to draw attention to the trailing offering.
- Live Bait: Particularly effective for species that prefer natural prey. Live bait can be trolled using specialized rigs, often with minimal weight and at very slow trolling speeds to keep the bait alive and swimming naturally. Examples include ballyhoo for offshore species, herring for salmon, or shiners for freshwater predators.
4. Boat Control
Maintaining a consistent course and speed is paramount for effective trolling, but also knowing when to vary them.
- Straight Lines: While sometimes effective, trolling in long, straight lines can be predictable.
- Turns: Gentle turns are a powerful tool. As you turn, your inside lines will naturally slow down and often sink slightly, while your outside lines will speed up and rise. This change in speed and depth can trigger strikes from fish that are following your lures but are hesitant to commit. Varying your turns and speed can make a significant difference in success.
- S-Turns: Making gradual “S” shapes with your boat is an excellent way to impart continuously varying speeds and depths to your lures, making them appear more erratic and enticing.
- Contouring: When fishing near underwater structure (e.g., humps, drop-offs, weed lines, river channels), try to follow the contours of the bottom. This keeps your lures in the most productive “strike zone” for longer periods.
- Wind and Current: Always consider the significant effects of wind and current on your boat’s speed and direction over the ground. You may need to constantly adjust your engine RPMs or use your kicker motor to maintain your desired trolling speed relative to the water or the bottom.
Setting Up Your Trolling Spread
A “trolling spread” refers to the deliberate arrangement and presentation of your fishing lines behind the boat. The primary goal is to cover different depths and widths simultaneously without tangling.
- Stagger Depths: Utilize various depth control methods (downriggers, diving lures, lead core, weighted lines) to present lures at different depths simultaneously. This allows you to explore the water column and identify the specific depth where fish are most active.
- Stagger Distances: Vary the distance each line is trolled behind the boat. This is crucial for preventing tangles, especially when making turns, and allows fish to see lures at different distances from the boat. Longer lines typically run outside or deeper.
- Utilize Planer Boards/Outriggers: These are invaluable tools for spreading lines out to the sides of the boat. This allows you to run more lines simultaneously and cover a much wider swath of water than if all lines were directly behind the transom. This is particularly important when targeting schooling fish or covering large, open areas.
- Rod Holders: Invest in quality, heavy-duty rod holders that can securely hold your rods at different angles. The angle of the rod can also subtly influence lure depth and action.
Reading the Water and Adjusting
Successful trolling is rarely a “set it and forget it” endeavor. Constant observation, analysis, and adjustment are crucial for maximizing your catch rate.
- Electronics (Fishfinder/Chartplotter): Your boat’s electronics are your most valuable allies. Pay close attention to baitfish schools, individual fish arches, bottom structure, and water temperature readings. Mark waypoints whenever you get a strike, as this indicates a potentially productive area.
- Baitfish Presence: If you observe baitfish on your sonar, or visually on the surface, chances are predatory fish are nearby. Try to troll through or around these bait schools.
- Bird Activity: Diving birds, especially gulls or terns, often indicate baitfish being pushed to the surface by predators actively feeding below.
- Water Color/Clarity: Adjust your lure colors based on water clarity. Brighter, more contrasting, or fluorescent colors often work better in stained or murky water, while natural, subtle colors are typically more effective in clear water.
- Current and Wind: Always understand how these environmental factors affect your boat’s speed over ground and how they influence the presentation and depth of your lures. You might need to troll with or against the current to achieve the desired lure action.
- Strike Zones: When you get a strike, immediately try to replicate the precise conditions (speed, depth, lure, and boat maneuver) that led to it. Circle back through the same area, or continue on a similar course if you believe you’ve found a productive zone.
Safety Considerations
Prioritizing safety on the water is paramount for any fishing trip, including trolling.
- Watch for Other Boats: Always maintain situational awareness and be acutely aware of other vessels in your vicinity, especially when making turns or deploying/retrieving gear.
- Clear Lines: Before starting your engines or making tight maneuvers, ensure your lines are clear of obstructions, particularly your propellor. A fouled prop can be dangerous and costly.
- Know Your Gear: Understand the limits and proper operation of your rods, reels, lines, and other trolling equipment.
- Weather: Continuously monitor marine weather forecasts and be prepared for rapidly changing conditions. Have a plan for seeking shelter if rough weather approaches.
- Personal Flotation Devices (PFDs): Ensure you have enough PFDs for everyone on board and that they are easily accessible. Consider wearing them at all times, especially in rough conditions.
Trolling is a highly effective and immensely rewarding fishing technique that demands patience, keen observation, and a willingness to experiment. By understanding and mastering the intricate interplay of speed, depth, lure selection, and boat control, you can significantly increase your chances of success and truly enjoy the thrill of pursuing a wide variety of fish species.