River Nymphing

Rising fish get all the glory, but they are the exception. For most of a season, on most rivers, trout are looking down — holding in the current and letting food come to them along the bottom. Nymphing is simply meeting them where they live: a weighted fly, drifting at their depth, at the speed of the water, through the seam they are sitting in. Learn to do it well and you will catch fish on days the dry-fly angler goes home empty.

Overview

The default fallback when nothing is rising — a weighted nymph drifting near the bottom, through the seam, under an indicator. On most Kootenay rivers it out-fishes everything else.

Field note

The most consistent way to catch river trout when the dry-fly bite is off. Get a weighted nymph down near the bottom through a seam, under an indicator. The go-to on the Goat and Moyie when nothing is showing.

At a glance

Fact

Details

Type

Sub-surface · nymphing

Water

Rivers & streams

Best when

Nothing rising · cold or high water

Difficulty

Intermediate

When to reach for it

Tie on a nymph rig whenever the surface is dead — no bugs, no rises — and whenever the water is cold, high, or off-colour after rain. Early and late in the season, through spring runoff, and in the middle of a bright summer day, the fish rarely come up. Nymphing is also how you prospect: cover unknown water efficiently and find where the fish are holding before you commit to a hatch.

The rig

Forget the tapered leader — it does not turn over weight and it does not sink. Build your own instead: about six feet of 8 lb Maxima Chameleon to a tippet ring, then six feet of 6 lb fluorocarbon to the fly. The stiff butt handles the extra mass; the fluoro tippet sinks and disappears.

Then get it down. A tungsten bead-head fly will do a lot of the work; add split shot or lead wraps a couple of feet above the fly until you are ticking bottom. Set a floating indicator roughly six feet up from the fly and adjust for depth as you move between runs. The whole game is the drift: mend your line so the indicator travels at exactly the speed of the current, dead-drift, with no wake dragging behind it.

Reading the water

Nymphing rewards fishing close — inside twenty feet — where you can control the drift and see the take. Read the river for the places fish hold out of the main push but with food streaming past:

Fact

Details

Seams

Where fast water meets slow

Foam lines

Bubble lines carry the food

Boulders

The soft water behind & beside

Drop-offs

Riffle spilling into a pool

The flies

Keep the box simple. A Beadhead Pheasant Tail in #8–14 covers most mayfly and small stonefly nymphs; a Gold-Ribbed Hare's Ear is the scruffy generalist that imitates almost everything; and a Prince Nymph gives you a flashier option when the water is coloured. Match the size to the naturals you turn up in the shallows, and lean one size smaller if fish are refusing.

Where it goes wrong

•

Not enough weight — if you never touch bottom, you are fishing over their heads

•

Drag — an un-mended indicator pulls the fly unnaturally; the fish know

•

Fishing too far — long drifts sag and you miss the take; stay close and tight

•

Wrong depth — reset the indicator every time the run gets deeper or shallower

On Kootenay water

This is the reliable fallback on the Goat and the Moyie when the dry-fly bite is off — which, through much of the year, is most of the day. Prospect the seams and pockets with a nymph, and keep a dry rig ready: the moment fish start showing on top, switch to small-stream dry-fly and enjoy it while it lasts.

Sources & further reading: local fly-and-technique notes for the Creston Valley and East Kootenay rivers. Rig details are a starting point — dial weight and depth to the water in front of you.

Small-Stream Dry-Fly

Mayflies — the nymphs you imitate