In the 80’s and 90’s it was normal behavior for me to fish one of the big Fraser River tributaries right the way through March back in the days when they left it open until then
We’re talking cold, like diamond plug ice in every guide after just a few casts cold, like freeze your spool so it doesn’t turn any more cold… like snap a wing off your fly cold…and throughout that crazy weather I never felt hob-knobbed or handicapped … the hits just kept on coming ——full floating line and a normal pattern
The only difference was you needed lots of patience… as in doing the Scottish worm crawl through the frog water pools because ambient Zero will push many of the steelhead
out of the faster water you’d fish in October
I never changed my normal approach other then bird-dogging the slower moving water … just used a bit shorter rod so I could clear the guides without wading to shore
Oh, and to combat the spool freezing on a fish—- the water was warmer then the air so I held my reel under water when I had to. The Lord blessed me with good circulation in those days… in these days, not quite so much…
I really miss those days—just me on a glorious piece of real estate….most people had long since hung it up thinking it was too cold…