We are Reader Supported. If you buy using links on this website, we may earn a referral fee. Learn More

Trout fishing is an exciting and rewarding outdoor pursuit that’s popular among anglers worldwide. One crucial aspect of trout fishing success is choosing the right line size for the conditions and techniques you plan to employ. So, what size line for trout fishing is ideal? Let’s find out from the pros!

what size line for trout fishing
Trout

Line Size Basics: Understanding Diameter and Strength

Before we delve deep to find out what size line for trout fishing is the best, it’s essential to understand the basics of fishing line diameter and strength. Fishing line sizes are typically measured in two ways:

  1. Diameter: The thickness of the line, generally measured in millimeters or inches.
  2. Strength: The breaking strength of the line, usually expressed in pounds (lbs).

The line size you choose will depend on several factors, including the type of trout you’re targeting, the fishing environment, and the specific techniques you plan to use.

Matching Line Size to Trout Species: Know Your Target

Trout come in various sizes and species, and selecting the appropriate line size will depend on the specific type of trout you’re targeting. Here’s a breakdown of common trout species and the recommended line sizes for each:

  • Rainbow Trout: These colorful fish are common in rivers and streams and can range in size from 1 to 10 pounds. A line size of 4-8 lb test is generally recommended for rainbow trout.
Rainbow trout
Rainbow Trout
  • Brown Trout: Brown trout can be found in both rivers and lakes and can grow quite large, with trophy-sized fish exceeding 20 pounds. Line sizes of 6-12 lb test are suitable for brown trout.
Brown trout
Brown Trout
  • Brook Trout: Smaller than their rainbow and brown trout cousins, brook trout are often found in cold, clear mountain streams. A line size of 2-6 lb test is appropriate for these smaller fish.
Brown trout
Brook Trout
  • Cutthroat Trout: Cutthroat trout are native to the western United States and can vary widely in size. Line sizes of 4-10 lb test are generally recommended for cutthroat trout.
Cutthroat Trout

Considering Fishing Environments: Match Your Line to the Conditions

The fishing environment plays a crucial role in determining what size line for trout fishing is best. Different conditions and water types may necessitate varying line sizes to maximize success. Here are some common fishing environments and the recommended line sizes for each:

  • Small Streams: In small streams with tight cover and clear water, a lighter line (2-6 lb test) is ideal to avoid spooking trout and facilitate stealthy presentations.
  • Large Rivers: Larger rivers with faster currents and larger fish may require a heavier line (6-10 lb test) for added strength and abrasion resistance.
  • Lakes and Ponds: In still water environments, the ideal line size will depend on the trout species and size, as well as the specific techniques being used. Line sizes of 4-10 lb test are generally suitable for lake and pond trout fishing.
  • Alpine Lakes: When fishing in high-elevation alpine lakes, lighter lines (2-6 lb test) are often recommended due to the clear water and wariness of the trout.

Fishing Techniques and Line Size: Find the Perfect Match

The specific techniques you plan to use for trout fishing will also impact your answer of what size line for trout fishing is best. Here are some popular trout fishing techniques and the recommended line sizes for each:

  • Fly Fishing: Fly fishing for trout typically requires lighter lines, with most anglers using a 2-6 lb test leader or tippet.
Fly fishing
Fly Fishing
  • Spin Fishing: When spin fishing for trout, line sizes will vary based on the lure weight and fishing environment. Generally, a 4-8 lb test line is suitable for most spin fishing applications
  • Bait Fishing: If you’re using live bait or artificial bait for trout, a line size of 4-8 lb test is commonly recommended. However, adjust the line size based on the size of the trout and the fishing environment.
  • Trolling: Trolling for trout in lakes or reservoirs often requires a heavier line (6-12 lb test) to handle the added stress of pulling lures through the water.

Line Material Matters: Monofilament, Fluorocarbon, or Braided Line?

Apart from the line size, the type of line material you choose will also impact your trout fishing success. Here’s a quick comparison of the three most common line materials and their suitability for trout fishing:

  • Monofilament: This popular and affordable line type is a solid choice for most trout fishing applications. Its stretch and versatility make it suitable for a variety of techniques and environments. Monofilament also floats, making it a great option for topwater presentations.
  • Fluorocarbon: Fluorocarbon is nearly invisible underwater, making it an excellent choice for clear water conditions where trout may be line-shy. It’s also abrasion-resistant and sinks faster than monofilament, which can be advantageous for certain techniques.
  • Braided Line: Braided lines have a higher strength-to-diameter ratio compared to monofilament and fluorocarbon, which allows for longer casts and increased sensitivity. However, their visibility and lack of stretch may not be ideal for all trout fishing situations. Many anglers use braided line with a fluorocarbon or monofilament leader to combine the best of both worlds.

Expert Tips for Choosing the Right Line Size: Insider Secrets

Now that we’ve covered what size line for trout fishing is ideal, here are some expert tips to help you make the best choice:

  • Go Light When in Doubt: Trout have excellent eyesight and can be easily spooked by heavy, visible lines. When in doubt, opt for a lighter line to increase your chances of success.
  • Experiment and Adapt: Trout fishing conditions can change quickly, so be prepared to adapt your line size based on the situation. Carry a range of line sizes and materials in your tackle box to ensure you’re always ready for any scenario.
  • Balance Your Tackle: When choosing a line size, ensure it’s compatible with your rod and reel. A balanced setup will improve your casting accuracy and overall fishing experience.

Conclusion: Reel in More Trout with the Right Line Size

Choosing the ideal line size for trout fishing is a crucial step in maximizing your angling success. By considering factors such as trout species, fishing environment, and specific techniques, you can determine what size line for trout fishing is ideal. And don’t forget to take into account the type of line material and balance your tackle for optimal performance. With these tips in hand, you’ll be well on your way to reeling in more trout!