I've always felt that the picket pin fly is one of those patterns that doesn't get nearly enough credit in modern fly boxes. In a world where everyone is obsessed with the latest synthetic materials, UV-reflective resins, and complex articulated streamers, there's something almost rebellious about tying on a fly that's essentially just some peacock herl and a bit of squirrel tail. But if you talk to the old-timers—the ones who consistently pull trophy trout out of rivers while everyone else is complaining about the hatch—they'll usually have a few of these tucked away in a corner of their foam patch.
It's a strange little fly when you really look at it. It doesn't exactly look like one specific bug, which is probably why it's survived so long. It's an "impressionistic" pattern, meaning it looks enough like a dozen different things that a hungry trout just decides it's worth a bite. Whether it's a stonefly, a drowned grasshopper, or even a small minnow, the picket pin fly covers a lot of bases without trying too hard.
A Bit of History Behind the Fly
I'm not usually one for history lessons when I'm just trying to get on the water, but the story of the picket pin fly is actually pretty cool. It's a Western classic, deeply rooted in the big rivers of Montana and Wyoming. It was popularized (and some say perfected) by Jack Dennis back in the day, but its origins go back even further.
The name itself is a nod to the local wildlife. Out West, "picket pin" is a nickname for the Richardson's ground squirrel. These little guys like to stand bolt upright on the prairie, looking like a wooden stake or a picket pin used to tether a horse. Since the original fly was tied with hair from a squirrel tail, the name stuck. It's a bit of fly-fishing lore that connects the sport to the landscape in a way that modern patterns sometimes miss.
When it first hit the scene, it was a staple for fishing the Madison and the Yellowstone rivers. Even today, if you walk into a fly shop in West Yellowstone, you're likely to see bins full of them. It's not just for nostalgia; it's because the trout in those big, brawling rivers still recognize it as food.
Why Peacock Herl is Pure Magic
If you ask me what the secret sauce of the picket pin fly is, I'll tell you right away: it's the peacock herl. I don't know what it is about those iridescent green fibers, but fish absolutely lose their minds over them. Maybe it's the way the light reflects off the fibers, creating a subtle "halo" effect that mimics the trapped air bubbles on a natural insect. Or maybe it's just that deep, buggy green color that looks so alive under the water.
In the picket pin fly, the body is made entirely of reinforced peacock herl. When it gets wet, it slims down and takes on a very specific sheen. Most people tie it with a bit of gold wire or thread to keep the herl from falling apart after one fish (because trout teeth are basically sandpaper), but that added ribbing also adds a tiny bit of flash. It's a simple combination, but it's stood the test of time for a reason.
The Versatility Factor
One of the biggest reasons I keep a row of these in my box is that I don't have to overthink how to fish them. The picket pin fly is a bit of a chameleon. Is it a streamer? Is it a wet fly? Is it a nymph? Yes to all of the above.
Fishing it as a Streamer
If you're on a smaller stream or even a big river during a time when there's a lot of fry around, you can fish a picket pin fly just like a small streamer. Give it some short, erratic strips. The squirrel tail wing has a lot of natural mottling that looks surprisingly like a small dace or a sculpin. Because it's usually tied on a 2XL or 3XL long hook, it has that "minnow" profile that triggers an aggressive strike.
The Classic Wet Fly Swing
This is probably the most traditional way to use it. Cast it across and slightly downstream, let the line tighten, and let the fly swing through the current. As the fly rises at the end of the swing, it looks exactly like a stonefly nymph or a caddis pupa heading for the surface to hatch. That's often when the "hammer" strike happens. It's a relaxing way to fish, and with a picket pin fly, it's incredibly effective.
Dead Drifting
Don't be afraid to put a split shot on your leader and fish this thing under an indicator. In larger sizes (like a 6 or 8), it's a fantastic imitation for a large dark stonefly nymph. In smaller sizes, it can pass for almost any generic "bug" tumbling along the bottom. The stiff hackle and the squirrel tail give it just enough vibration to get noticed even in murky water.
Tying Your Own Picket Pin Fly
For those of you who sit at the vise, the picket pin fly is a joy to tie because it's so straightforward. You don't need twenty different materials or a degree in micro-surgery.
- The Tail: Traditionally, it's a bit of brown hackle fibers or even more squirrel tail. Some people leave it off entirely, but I think a little tail helps with the balance.
- The Body: Build a nice, thick rope of peacock herl. I like to use the "herl loop" technique where you twist the herl with some thread to make it more durable.
- The Ribbing: Gold wire is the standard. It protects the herl and adds that little bit of "bling."
- The Wing: This is the defining feature. Grab a clump of gray squirrel tail. You want it to lay flat over the back, extending just past the bend of the hook. Don't use too much—you want a sleek profile, not a bushy mess.
- The Hackle: A few turns of brown or furnace hackle at the head. It shouldn't be overly thick; you just want enough to suggest legs and provide some movement.
- The Head: A nice, clean thread head (usually black or red) completes the look.
I've experimented with adding a gold bead head to mine lately. It's not "traditional," but it helps get the fly down into the strike zone faster, especially in heavy Western currents. Plus, the extra weight gives the fly a bit of a jigging motion when you strip it, which trout seem to find irresistible.
When to Reach for This Pattern
Let's be honest: there are days when the fish are being extremely picky. If there's a massive hatch of size 22 Blue Winged Olives and the trout are sipping them off the surface, the picket pin fly probably isn't your first choice. But on those "in-between" days—when nothing much is happening on the surface or when the water is a bit high and off-color—that's when this fly shines.
I specifically love using it in the late summer. When grasshoppers start hitting the water, a picket pin fly fished just under the surface is a killer. It looks like a hopper that didn't quite make it and is now drowning and struggling. There's something about the mottled squirrel hair that perfectly mimics the look of a sodden insect wing.
It's also my "scout" fly. If I'm on a new piece of water and I have no idea what's going on, I'll often tie on a picket pin fly. It's such a generalist pattern that if there are active fish around, one of them is going to give it a look. It helps me gauge the mood of the river without having to cycle through fifty different specialized nymphs.
Final Thoughts on a Classic
It's easy to get caught up in the "new is better" mentality in fly fishing. We spend a lot of money on gear that promises to make us better anglers, but sometimes the real secret is just going back to the basics. The picket pin fly doesn't have a marketing department or a fancy social media account, but it has decades of proven results.
If you don't have any in your box, do yourself a favor and pick up a few (or tie a dozen). They don't take up much space, and they might just save your day when the "fancy" flies aren't doing the trick. There's a reason this pattern has been a staple in Montana for nearly a century—it just catches fish. And at the end of the day, isn't that why we're out there anyway?
Next time you're standing on the bank, staring at a run and wondering what to throw, reach for that weird little squirrel-hair-and-peacock-feather combo. You might be surprised at just how much the fish still love the picket pin fly.