$39.99

Shipping calculated at checkout.

Color

BLACK

LEMON GREEN

Size

WF-6-F

WF7F

DT5F

Free Shipping over $50

Low stock - 2 items left
Inventory on the way

[{"id":50753198555447,"title":"BLACK \/ WF-6-F","option1":"BLACK","option2":"WF-6-F","option3":null,"sku":"R00031029-003","requires_shipping":true,"taxable":true,"featured_image":{"id":33004662784198,"product_id":7235925213382,"position":2,"created_at":"2022-03-22T12:54:01-04:00","updated_at":"2025-06-25T09:18:31-04:00","alt":"RIO Mainstream Trout Fly Line BLACK","width":1400,"height":1400,"src":"\/\/checkout.boynecountrysports.com\/cdn\/shop\/products\/RIO-MAINSTREAM-TROUT-LINE-1-min.jpg?v=1750857511","variant_ids":[50753198555447,50753198588215]},"available":false,"name":"RIO Mainstream Trout Fly Line - BLACK \/ WF-6-F","public_title":"BLACK \/ WF-6-F","options":["BLACK","WF-6-F"],"price":3999,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":"730884207430","featured_media":{"alt":"RIO Mainstream Trout Fly Line BLACK","id":25344151847110,"position":2,"preview_image":{"aspect_ratio":1.0,"height":1400,"width":1400,"src":"\/\/checkout.boynecountrysports.com\/cdn\/shop\/products\/RIO-MAINSTREAM-TROUT-LINE-1-min.jpg?v=1750857511"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":50753198588215,"title":"LEMON GREEN \/ WF7F","option1":"LEMON GREEN","option2":"WF7F","option3":null,"sku":"R00031029-004","requires_shipping":true,"taxable":true,"featured_image":{"id":33004662784198,"product_id":7235925213382,"position":2,"created_at":"2022-03-22T12:54:01-04:00","updated_at":"2025-06-25T09:18:31-04:00","alt":"RIO Mainstream Trout Fly Line BLACK","width":1400,"height":1400,"src":"\/\/checkout.boynecountrysports.com\/cdn\/shop\/products\/RIO-MAINSTREAM-TROUT-LINE-1-min.jpg?v=1750857511","variant_ids":[50753198555447,50753198588215]},"available":true,"name":"RIO Mainstream Trout Fly Line - LEMON GREEN \/ WF7F","public_title":"LEMON GREEN \/ WF7F","options":["LEMON GREEN","WF7F"],"price":3999,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":"730884207447","featured_media":{"alt":"RIO Mainstream Trout Fly Line BLACK","id":25344151847110,"position":2,"preview_image":{"aspect_ratio":1.0,"height":1400,"width":1400,"src":"\/\/checkout.boynecountrysports.com\/cdn\/shop\/products\/RIO-MAINSTREAM-TROUT-LINE-1-min.jpg?v=1750857511"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":50906498203959,"title":"BLACK \/ DT5F","option1":"BLACK","option2":"DT5F","option3":null,"sku":"R00031029-30533933","requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"RIO Mainstream Trout Fly Line - BLACK \/ DT5F","public_title":"BLACK \/ DT5F","options":["BLACK","DT5F"],"price":3999,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":"730884207515","requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}]

{"id":50753198588215,"title":"LEMON GREEN \/ WF7F","option1":"LEMON GREEN","option2":"WF7F","option3":null,"sku":"R00031029-004","requires_shipping":true,"taxable":true,"featured_image":{"id":33004662784198,"product_id":7235925213382,"position":2,"created_at":"2022-03-22T12:54:01-04:00","updated_at":"2025-06-25T09:18:31-04:00","alt":"RIO Mainstream Trout Fly Line BLACK","width":1400,"height":1400,"src":"\/\/checkout.boynecountrysports.com\/cdn\/shop\/products\/RIO-MAINSTREAM-TROUT-LINE-1-min.jpg?v=1750857511","variant_ids":[50753198555447,50753198588215]},"available":true,"name":"RIO Mainstream Trout Fly Line - LEMON GREEN \/ WF7F","public_title":"LEMON GREEN \/ WF7F","options":["LEMON GREEN","WF7F"],"price":3999,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":"730884207447","featured_media":{"alt":"RIO Mainstream Trout Fly Line BLACK","id":25344151847110,"position":2,"preview_image":{"aspect_ratio":1.0,"height":1400,"width":1400,"src":"\/\/checkout.boynecountrysports.com\/cdn\/shop\/products\/RIO-MAINSTREAM-TROUT-LINE-1-min.jpg?v=1750857511"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}

Targeted to the overall needs of the average fly fisher.

RIO's Mainstream series of fly lines have been developed to meet the overall needs of the average and novice fly fisher, and are designed to optimize rod performance with slightly heavier and shorter head lengths. Every Mainstream line undergoes the same rigorous production processes and quality control standards as all RIO fly lines, and is made in RIO's Idaho manufacturing facility. Each line is built with a slick coating on a supple memory-free core, for the best in performance.

Free UPS GROUND SERVICE Shipping on orders of $50.00 or more

Standard Ground Shipping $49.99 and below - $8.00
Expedited Shipping UPS 2 Day - $40.00
Expedited UPS Overnight - $75.00
** Please note some oversized items are excluded from Expedited shipping such as:

Bote Docks, Kayaks and Paddle Boards
Yakima cargo carriers

We ship all orders within 24-48 hours of confirmed payment
Continental United States only - no international shipping available