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RIO™ Mainstream Trout Fly Line

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Quick Overview

RIO's Mainstream Trout Line was developed to meet the overall needs of the average and novice fly fisher. Mainstream Trout WF is designed to optimize rod performance with slightly heavier and shorter head lengths.

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RIO™ Mainstream Trout Fly Line

The RIO™ Mainstream Trout Line is designed to meet the overall needs of the average and novice fly fisher. Mainstream Trout WF is designed to optimize rod performance with slightly heavier line and shorter head lengths. Every Mainstream Line is produced in RIO’s Idaho manufacturing facility, and undergoes the same rigorous production process and premier quality control standards as all RIO™ Fly Lines.


The reasonably priced, Mainstream Trout WF Fly Line optimizes performance with slightly heavier line for easy loading, and shorter, front tapered head length that results in good presentation and turnover. Each line features RIO™ XS Technology for an amazingly slick, dirt-repelling, coldwater coating, as well as RIO™ AgentX Undercoat and Super Floatation Technology on a memory-free core, that ensures both the tip and running line will float high and provide the highest performance.


For easy casting and versatility, try the RIO™ Mainstream Trout WF Fly Line. You’ll no doubt see more action, and ultimately catch more fish the next time you head to your favorite fishing hole.


  1. New Rod, New Line review by Marc D. on 3/30/2016

    I recently set up a new reel and needed some 3 wt line. I wasn\'t too worried about long-term quality so I decided to get a budget line. So far, I have had no issues with this line. In a 3 wt, I\'m not making long casts or pulling in big fish. Just need a line to help put a fly down softly on the water. This one does the job.

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Most items ship within 1 business day. We ship orders from our warehouse Monday through Friday. If an in-stock order is placed on Friday evening, Saturday or Sunday, it may not ship out until the following Monday. We rush-ship directly to customer's doors throughout the United States. Depending on the shipping method and area of the country, orders can arrive between 1 and 7 business days. 


Standard Ground FREE over $50 4-7 Business Days
Three-Day Variable Cost 3 Business Days
Two-Day Variable Cost 2 Business Days
Overnight Variable Cost 1 Business Day

First Class $3.00 to $5.00 1-5 Business Days
Priority Mail Variable Cost 2-3 Business Days


If you are not 100% satisfied with your order, you can return it to us for a refund or exchange within 30 days of delivery. We accept returns on all products that have not been used or registered, no questions asked. All returns are subject to a 5% Re-Stocking Fee. To make returning an item easy, contact our friendly customer service representatives toll free 1-855-297-7000.

warning-iconWARNING: This product can expose you to Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to -