Top 5 Most Useful Dry Flies for West Coast Rivers
· Lando
If you're wondering what are the best dry flies for trout on the West Coast, the answer is surprisingly simple. While every river has its unique hatches and the local dry flies that match, there’s a handful of proven standard patterns that consistently catch fish from California to Oregon, Washington, and Idaho. Whether you're fishing the Lower Sacramento, McCloud, Deschutes, ++Truckee++, Yakima, ++Rogue++, or countless mountain streams, these five dry flies belong in every fly box.
The flies below imitate the insects trout encounter most often, float exceptionally well, and are effective whether you're matching a hatch or simply searching for feeding fish. If you only had room for five dry flies, these would be among the best choices.
1. Parachute Adams
The Parachute Adams is widely considered the most versatile dry fly ever created. Rather than imitating a single insect, it serves as a convincing representation of many different mayflies. It closely resembles Blue-Winged Olives (BWOs), Pale Morning Duns (PMDs), Gray Drakes, and numerous local mayfly species found throughout Western rivers.
One of its greatest strengths is visibility. The white parachute post allows anglers to easily track the fly in riffles and broken water while the low-riding profile presents naturally to trout.
Best for:
- Rainbow trout
- Brown trout
- Cutthroat trout
- Brook trout
Recommended sizes: #12–18
Best seasons: Spring through fall
Pro Tip: If you're unsure what trout are feeding on, start with a size 14 or 16 Parachute Adams. It catches fish even when there isn't an obvious hatch.
2. Elk Hair Caddis
Caddisflies are among the most abundant aquatic insects on West Coast rivers, making the Elk Hair Caddis one of the most productive trout flies ever designed.
Adult caddisflies often flutter across the water or skitter during egg-laying, and trout frequently attack them aggressively. The elk hair wing provides outstanding flotation, making this fly perfect for rough water and fast riffles.
Many anglers also gently twitch or skate a Caddis fly pattern across the current, mimicking the natural movement of adult insects.
Imitates:
- Adult caddisflies
- Emerging caddis
- Small stoneflies in some situations
Recommended sizes: #12–18
Best seasons: Late spring through early fall
Best water: Freestone rivers, pocket water, riffles, and tailwaters
3. Stimulator
If there is one fly that deserves the title of the best attractor dry fly, it's the Stimulator.
Originally developed to imitate large stoneflies, the Stimulator has evolved into an all-purpose pattern that can represent salmonflies, golden stoneflies, caddisflies, grasshoppers, and other large terrestrial insects. Even when trout aren't keyed in on a specific hatch, they'll often attack a well-presented Stimulator out of instinct.
Its high-floating design also makes it an excellent indicator fly for dry-dropper rigs.
Targets:
- Rainbow trout
- Brown trout
- Cutthroat trout
- Bull trout (occasionally)
Recommended sizes: #8–16
Best seasons: Summer through early fall
Bonus: Few flies are better during the famous salmonfly hatch on Western rivers. Note: There’re some color variations of the Stimulator (ie yellow and orange) that some folks swear by. It may be worth having some different ones in the box.
4. Purple Haze
Despite its unconventional color, the Purple Haze has become one of the most trusted mayfly patterns in the western United States.
Developed as a variation of the Parachute Adams, the purple body creates an attractive silhouette that trout often find irresistible, especially during low-light conditions or mixed mayfly hatches. Many experienced anglers report that the Purple Haze outperforms more realistic flies during evening spinner falls. It’s like the Parachute Adams but with a purple abdomen you just can’t miss…and the trout can’t resist!
It's particularly effective on selective trout in clear water.
Imitates:
- Blue-Winged Olives
- Pale Morning Duns
- General mayflies
- Small attractor profile
Recommended sizes: #14–18
Best conditions: Evening hatches, overcast days, clear water
5. Royal Wulff
The Royal Wulff has remained popular for generations because it doesn't try to imitate one specific insect—it simply looks like food.
Its bright white wings make it incredibly easy to see, while the peacock herl body, red band, and bushy hackle suggest everything from large mayflies to terrestrial insects. In fast mountain streams where trout have only seconds to decide whether to eat, realism becomes less important than visibility and presentation.
This fly excels in pocket water, high-gradient rivers, and freestone streams throughout the West. It floats very well and where there are strong riffles, its silhouette really pops.
Best for:
- Aggressive trout
- Fast-moving water
- High-country streams
- Beginning fly anglers who need excellent visibility
Recommended sizes: #10–16
Choosing the Right Dry Fly Size
Even the best fly pattern won't produce consistently if it's the wrong size. Matching the size of the natural insects is often more important than matching the exact color.
A good starting selection includes:
- #10–12: Salmonflies, golden stoneflies, grasshoppers
- #14: Large mayflies and caddis
- #16: Blue-Winged Olives, PMDs, general searching
- #18: Small mayflies and selective trout
Carrying each of these five patterns in several sizes will prepare you for nearly every hatch you'll encounter on Western rivers.
Final Thoughts
The West Coast offers some of North America's finest dry fly fishing, but success doesn't require carrying hundreds of different patterns. A carefully selected box built around the Parachute Adams, Elk Hair Caddis, Stimulator, Purple Haze, and Royal Wulff will cover the vast majority of trout-feeding situations from California's Sierra rivers to Oregon's Cascades and Washington's mountain streams. You’ll start noticing variations of these patterns as you visit local flyshops (e.g. legend has it that the purple haze started as a local variation of the parachute adams out in Montana and it just took off from there).
Master these five flies, pay close attention to insect size and presentation, and you'll spend less time changing flies and more time watching trout rise. For many experienced fly anglers, these patterns aren't just backup options—they're the flies tied on first, day after day, season after season.