Pattern Library
Blowtorch fly pattern
Nymph · #100 of 129

Blowtorch

Also known as: Devin Olsen's Blowtorch

Imitates: Mayfly nymph, midge larva, and hot-spot Euro attractor

Quick Reference

Best Sizes
#14-18
Best Season
Year-round
Best Conditions
Euro nymphing, pocket water, fast runs, pressured trout
Water Temp
38-60°F
Recommended Tippet
5X-6X fluorocarbon

How to Rig It

Fish as the point fly or middle fly in a Euro rig. The heavy bead and slim body get down fast without extra shot.

How to Present It

Tight-line near the bottom with controlled contact. Let it drift naturally, then lift slightly at the end to trigger grabs.

Why It Works

The Blowtorch combines a slim dark body, bright collar, and quick sink rate in one of the most efficient modern competition nymphs ever designed. Trout see the hot spot, then commit to the buggy silhouette.

History

Designed by Devin Olsen and popularized through Tactical Fly Fisher, the Blowtorch became one of the most recognizable flies of the modern Euro-nymphing era and a confidence fly for competitive anglers worldwide.

Pro Tip

If fish ignore a plain perdigon, swap to the Blowtorch. The orange collar often turns lookers into eaters, especially in pocket water and off-color flows.

Frequently Asked Questions

What does the Blowtorch imitate?+

It is mostly a confidence-driven attractor nymph that can pass for mayfly nymphs, midge larvae, or just a small hot-spot food item near the bottom.

Why is the Blowtorch so effective?+

Because it sinks fast, stays slim, and has a bright hot spot that helps trout key in on it without making the fly look unnatural.

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