How to Read a River & Find Trout

Name: How to Read a River & Find Trout
Uploaded: 2026-09-16T14:00:00-06:00
Duration: 13 min 45 s
Description: In Episode 4 of the Tenkara Master Class, Pat takes the lessons onto the water and shows how he methodically breaks apart a river to find and approach feeding trout.

In Episode 4 of the Tenkara Master Class, Pat takes the lessons onto the water and shows how he methodically breaks apart a river to find and approach feeding trout.

14 min
Taught by Pat Jaeger
With Fish the West Films

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Finding more trout starts with learning how to approach and read the river.

In Episode 4 of the Tenkara Master Class, Pat Jaeger takes the lessons onto the water and shows how he methodically breaks apart a river to find and approach feeding trout. Instead of immediately casting toward the water that looks best, Pat starts close and works his way farther out, treating the river almost like mowing a lawn. That approach can uncover fish sitting in overlooked water—including fish directly under your rod tip that other anglers may have walked right past.

Pat also breaks down three different ways anglers approach fish: the Donkey, the Great Blue Heron, and the Panther. His preference is the Panther—soft feet, staying low, avoiding your silhouette, and putting yourself in a position where the fish can continue feeding naturally.

From there, Pat shows how to identify productive trout water by looking for hedges, ledges, and edges—vegetation and cover, transitions from shallow to deep water, and seams where fast and slow currents meet. He also explains how water temperature changes the equation: when the water is cold, look for slower water; when it’s warm, look toward faster, more oxygenated water.

Once he finds feeding fish, Pat demonstrates how positioning can be more important than simply making more casts. He divides the river into lanes, uses the wind and current to his advantage, casts away from the fish, moves the fly into the correct lane, and then feeds it naturally toward the trout. And when it all comes together, we get to put those lessons to work on an actual fish.

Read the full transcript

TENKARA ON THE RIVER: PROSPECTING, APPROACH, READING WATER, CASTING, AND FISH HANDLING

CHAPTER 1: PROSPECTING TECHNIQUES

Hey, you guys. I'm on the river right now, and I'm going to give you my two cents on how to methodically cut this place apart and how to fish it from close to far.

Right now, basically, what I'm doing is prospecting. I'm starting from close and going to far. I'm mowing a lawn. I'm eating corn on the cob. I see water that I really want to fish, but I'll be methodical, and I'll fish that water when I get there. In the meantime I'm acting as if I don't know where the fish are. If you fish honestly from close to far, a lot of times you'll end up catching two or three fish on the way to the water you want.

I like to use my rod as a measuring device. If my rod goes over the river, I'm too far, so I back up a little more.

It paid off to fish a lane that I don't normally fish. Against all odds, he ate the dry fly. Are you kidding me? Come on, buddy. You get out of here. You go that way. All right, my hunch paid off.

I've never caught a fish in this lane. I looked at the river and thought, "I never made a drift there." Why don't people catch fish in these lanes that are close to them? Because they stand right here. There's beaten-down grass right here. This is where people sit and stand and fish, and they're trying to get over to that lane I liked. The safest fish is the one under the rod tip. That's why I backed out and used my rod as a measuring device, and I fished that close lane.

Again, as a prospector, I'm going to take every piece of water and cut it to pieces. I'm not going to just try to fish the other side of the river. I'm going to fish close to far. That's a prospecting technique.

CHAPTER 2: APPROACHING THE RIVER

I know you want the answer, but let me give you a formula. When you approach a river, you have three options.

One is the donkey. (Oh, there goes a fish.) That's the donkey: you stomp right up. People do it all the time.

Or you have the great blue heron. The great blue heron will stand here for about half an hour. All those fish that spooked will come back, if you're interested in that.

Or we could do this: go back with soft feet, not break silhouettes, take a knee, and be the panther.

In my logic and my style of fishing, I would rather step back. I'd rather get in the duck blind. I'd rather hide and allow the fish to feed without caution. Those are my three choices.

CHAPTER 3: HEDGES, LEDGES, AND EDGES

The water choices I'm after are, again, a formula, and this formula will work in Argentina, Utah, Montana, wherever. You want to look for hedges, ledges, and edges.

Hedges are aquatic vegetation. I see green weeds right there, and they're full of bugs. They're also good current relief. That's a hedge. If I had an overhanging branch, tree, or bushes, I'd see caddis in there, or ants falling off and getting eaten. Hedges are huge.

The next thing we look at is the ledge, where shallow meets deep. That works great for marlin fishing in Kona, too. It's what all fly fishermen think about: fish the ledge where shallow meets deep.

The last one, and the one I see right in front of me now, is an edge, where fast water and slow water meet. You might even call it a seam. I'm looking right at this edge here. The fish can sit in the slow water and feed on the conveyor belt of food. That's my formula: hedges, ledges, and edges.

Here's another one. When the water's cold, go slow: look for slower water. When the water is warm, look for aerated, faster water. I see people all the time fish winter water as if it were July, and in the winter a lot of times the water is a lot cooler.

To summarize: you've got the donkey, the great blue heron, and the panther. I choose the panther. You'll be looking for hedges, ledges, and edges. If the water's cold, look for slow. If the water's warm, look for fast.

Let's see if we can hunt down another trout.

CHAPTER 4: CASTING AND PRESENTATION

I've got wind coming from the south right now, and a few little noses are poking their heads up right here. I'm going to see if I can wish them up. I'm seeing a few bugs go down. Again, I have options: I can be above them, below them, or across from them. It's really important that you're not lazy and that you take the best position possible. A small number of drifts from the best position will do a lot better than a whole bunch of drifts from bad positioning.

I'm seeing bugs go down, but it looks like we spooked them a little. I'm going to clean my fly and make sure it's right. Barbless.

Number one: when they're up, we're up.

The way I'm positioned right now, the currents are on my side, and I'm upriver of them. I think of it this way: I'm in lane zero. Right on the edge is lane one. The middle of the current is lane two. Then the far edge is lane three. I mark them lane by lane. What I'm looking at right now, again, is the wind at my back, which is going to help me.

I see a rising trout. He was back there a little bit. With the amount of line I have, I think I can make it with a stretch. Yeah, they're in the tail. With a little stretch, I think I can get out there.

Fish in lane one and lane two: what I'm going to do is a diagonal cast, in any lane except that one. I'll make a cast in lane three or four or five, sweep my rod, and drag the fly into the proper lane where I see the fish rising. Once I've positioned it in the proper lane, all I do is push my hand down and feed that fly to that fish.

I see him, so I'm going to make my cast. If you make a mistake, just recast. Don't worry about it.

The three elements are these: back cast, front cast, and drag to the lane I want. If I miss, I redo it and start over. If my angle is too high upriver, I readjust by turning my shoulders. I don't want to cast onto the fish, so I'm going to turn my shoulders a little to my left.

Just missed him. I might have set a little too fast. And if you're fishing downhill and you see the mouth open up, we get excited and can easily pull the fly right out of the mouth. That's pretty much what I just did.

CHAPTER 5: FIGHTING AND HANDLING FISH

Oh, baby.

All right, fish fighting. If we can keep the fish across from us or upriver, that's best. I've got a little power band right here, and I can put a lot of power on him. He's not running. He's right in this little still section.

Got it. Put it under my right hand. Whoa. Soft with my hands. Get his head.

Keep the fish in the water. Whenever you do lift a fish out, hold your own breath. It's the way we do it, the way we teach our kids, the way we teach everybody. Hold your own breath, and you start to understand what he's going through.

Wow, that was fun, man. Again: simple rigging, simple techniques. We're going to keep going with this stuff. Sure appreciate you all watching, and I'll see you on the next episode.