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Stepping into a reach I had never laid eyes on, water spilled across the floodplain through newly cut side channels, occupied new backwaters, and spilled through massive apex log jams. Beautiful pools formed below the jams and behind precisely placed root wads. Riffles spilled across cobble bars parallel to the head of the pool, forming textbook dry-fly dead-drifting waters, irresistible to inhabiting trout.
Knowing the fish would be somewhat less active in the glacial June flows, I nevertheless opted for a size 12 elk hair caddis. Having embraced fishing simply, a tenkara fly rod has become my go-to for mountain trout streams. Capable of landing fish as large as salmon (speaking from personal experience), easily reaching mid-stream pocket water habitats, and presenting a flawless dead-drift, a lightweight tenkara rod and single fly box graced my presence as I traversed the cottonwood riparian and shallow riffles.
A riffle formed the beautiful emerald pool where it collided at 90-degrees with a large toppled tree root wad. Hydraulic forces cut their way through the substrate until the head of the pool widened enough to shift flow and scour downstream depths. It was the ideal location for a calculated approach and fly presentation.
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Dropping the caddis into the riffle and watching it bob carelessly into the flow seam below, it was no surprise that a rainbow stealthily slithered to the surface, trouncing the fly with the confidence of snagging an easy meal. A soft pop of the wrist set the hook with the tenkara rod, which played the 12-incher through the riffle and into a shallow pocket for a safe release. The fish’s cotton candy pink lateral line, grape-sized parr marks, and overall random speckling of bluish blotches and tiny black flecks were a sight to behold. Its otherwise chrome sheen was nearly blinding in the morning sun as rays peaked over the eastern basalt rim.
Approaching “fishy” habitat is an important consideration. How the angler casts a shadow, disturbs the water, or presents the fly and line can mean the difference between landing multiple, and possibly big fish, and no fish. Consider a classic log jam and downstream pool.
Whenever possible, approach the pool with the sun in your face. Keeping a long shadow off the water serves well to avoid spooking fish. Additionally, I like to approach from the side and begin near the top of the pool. Bigger trout get the best “lie”, meaning they take preferred feeding zones, which are usually farther back in the pool where the water is calmer and predators more visible. Fish are easily spooked here and often race into the whitewater at the top of the pool seeking shelter. Game over.
Approaching from the side, one can cast high or across the pool and drift down for the best presentation. Additionally, any fish caught in the top of the pool are less likely to escape to the tail and spook other fish when released.
If you must approach from the bottom end, carefully work your fly further and further into the pool to try to catch any fish near the tail before spooking them with the line touching down or wading into them.
When approaching from the top, keep a low profile and dead drift the fly from the head of the pool into the middle and tail. This is superbly easy to do with a fixed length of line approximately one-, to one-and-a-half times the rod length. Keep the rod tip high as the fly touches down, then slowly drop the rod consistent with the flow rate to keep line drag from affecting the fly drift. A hungry trout cannot pass on a caddis presented accordingly.
Aside from log jams and pools, gentle runs with large boulders providing velocity breaks are a good choice. Side channels, root wads, and anywhere riffles push perpendicular into a stream bank or other structure, creating a deeper pocket, is bound to hold trout. Trout also seek flow seams where faster water eddies off into slower water, depositing food, and allowing trout to save energy when holding position.
Approaching the next pool from below, a gravel bar split the pool, sending a run to the river-right bank that paralleled a downed tree, and creating a scour pool on the river-left bank beneath a small, submerged tree. Drifting a fly along the right-bank produced a single missed strike, but working slowly to the head of the left-bank pool enticed several fish seeking shelter beneath the tree.
While fly-fishing may seem intimidating to the novice, there are three general keys to mountain stream trout that can be quickly mastered; quality habitat, a stealthy approach, and clean fly presentation. The best producing areas are always those resembling quintessential trout habitat, with braided channels, large wood, a good riffle-run-pool sequence, and lush riparian vegetation. An elk hair caddis or Adams are staple flies, working on nearly any mountain stream at any time, making fly choice less concerning.
Mountain streams are the heart and soul of fly-fishing. Keep it simple. Keep the rod tip high. And savor the radiance of those speckled forest gems.