The fly line is one of the most critical pieces of equipment when it comes to properly transferring the power of a cast to the leader, tippet, and eventually the fly. There are a lot of options for fly lines; tapers, floating/sinking, and size to name a few. After a solid year of using Rio Mainstream fly line on my favorite small stream rod, I’d like to offer up a review of some of my feelings about Rio’s low-to-mid price range fly line.

Casting Rio Mainstream Fly Line
First Impressions:
It was about a year ago now that I relined my 6’6″ 3wt. small stream fly rod with accompanying 2/3wt. reel. I waded through a lot of different brands of fly line, but I settled on Rio and eventually the Rio Mainstream WF3F fly line. Upon receiving the line and loading the reel, I noticed that the line was very supple, and didn’t retain much memory from the shipping spool. Rio claims the Mainstream line features “Supple self-lubricating coating, memory-free in cold water” and “Easy casting taper designs.”
Pros/Cons:
P: Price – The price of the Mainstream fly line is one of its best selling points. At just under $40 at most retailers, it is one of the least expensive yet quality lines available. Before buying I researched higher priced lines by Rio as well as other companies, but decided to go with the ‘budget priced’ Mainstream line.
P: Easy Casting – The Mainstream line is one of the most supple lines I’ve used in quite some time. It has virtually zero memory, meaning it casts smooth and easy, and lays out flat on the water instead of coiling up like some lines tend to do after being on the reel for a while. Rio claims that the line is easy casting and a great line for beginners. I agree, and would recommend it to any beginner fisherman looking for their first line, but I would also recommend it to an experienced fisherman looking to load a spare spool.
P/C: No Loops – Some people much prefer loops on their fly lines to allow easy leader changes with all loop-to-loop connections. For those people, the lack of a loop at the end of the fly line is a con. However, I prefer to have no loop at the end of my fly line because I make my own loop with Sunset Amnesia red monofilament. I learned this technique from Zach Matthews of The Itinerate Angler, whose video is embedded at the end of this review. I prefer this over welded loops in my fly line because the bright red monofilament line acts as an indicator when fishing nymphs and streamers.
P: Made in Idaho USA – Enough said!
P: Durability – I typically expect my fly lines to last about a year. Currently, I’ve been using this line for a year now, and I’m going to try to push it another 6 months to a year if I can. So far, I’ve had no reason to question the durability of this line.
Summary:
The Rio Mainstream fly line is a great entry level product by a made in USA company. I prefer to buy American made, and it makes it even better when it’s a great product. The price of the Mainstream line is on par with most budget or entry level fly lines, making it a good purchase for beginners as well as spare spools for the experienced fisherman. When it’s time for new line, I plan on purchasing another Rio line, if not the Rio Mainstream.
The Verdict:
Buy it… If you are a beginner fly fisherman looking for your first fly line or looking to improve your casting skills, this is the perfect fly line for you. It is reasonably priced and very forgiving to cast. Accurate roll casts are required in the small Western North Carolina wild trout streams, and this line performs very admirably with all size flies from dries to streamers.
Disclaimer:
All reviews here at Foul Hook are my honest opinion. I purchased the product in this review myself and have not been compensated financially or otherwise for writing this review. At the time of publication of this article, I have no affiliation with the Rio Products.












