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RIO™ Mainstream Trout Fly Line

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.


Availability: In Stock

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RIO™ Mainstream Trout Fly Line

Targeted to the needs of the average fly fisher
RIO - built by anglers for anglers

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.


RIO™ Mainstream Trout Fly Line

RIO™ Mainstream Trout Fly Line.

Rating: 4/5 based on 1 review(s)
  • Price: 39.95 - In stock
  1. New Rod, New Line review by Marc D. on 3/30/2016
    Rating 1-5 Stars

    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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Rating 1-5 Stars
Line Size30ft Head WtFull Head WtHead LengthTotal Length
WF3F 120gr / 7.8gm 141gr / 9.1gm 36ft / 10.9m 80ft / 24.4m
WF4F 140gr / 9.1gm 165gr / 10.7gm
37ft / 11.2m 80ft / 24.4m
WF5F 160gr / 10.4gm 195gr / 12.6gm 38ft / 11.5m 80ft / 24.4m
WF6F 185gr / 12gm 230gr / 14.9gm 39ft / 11.8m 80ft / 24.4m
WF7F 210gr / 13.6gm 280gr / 18.1gm 40ft / 12.1m
80ft / 24.4m
WF8F 240gr / 15.6gm 310gr / 20.1gm 41ft / 12.5m 80ft / 24.4m


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 in 1-5 business days. Our policy as an organization is to successfully deliver on all orders, regardless of the chosen shipment method.


Free Free for all orders $50+ 5-7 Business Days
Priority $6.00 3-5 Business Days
Two-Day $30.00 2 Business Days
Overnight $60.00 1 Business Day



If you are not 100% satisfied with your order, you can return it to us for a refund or exchange within 14 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 1-855-281-9000.

RIO™ Mainstream Trout Fly Line SPECIFICATIONS
Lemon Green
Head Length 36 TO 41 FEET
Total Length 80 FEET