Midges are the most abundant aquatic insects in most trout streams, and they're available to trout 365 days a year. While many anglers overlook midge fishing in favor of more glamorous hatches, those who master the art of fishing tiny flies consistently catch more trout — especially in winter and on heavily pressured tailwaters where midges are the primary food source. Browse our full Midges collection to stock up on the patterns covered in this guide.
Why Midges Matter
Chironomids (the scientific name for midges) are small, two-winged flies that hatch in enormous numbers throughout the year. In tailwater fisheries like the San Juan River in New Mexico or the Bighorn River in Montana, midges can make up 50–80% of a trout's diet. Even in freestone streams, midges are a critical food source during winter and early spring when other insects are scarce.
The key to midge fishing is understanding the life cycle: midges spend most of their lives as larvae and pupae in the substrate, then hatch into adults at the surface. Trout feed on all three stages, but the pupa stage — when the insect is rising to the surface to hatch — is often the most productive to imitate.
The Zebra Midge: A Tailwater Essential
The Zebra Midge is one of the most effective midge patterns ever developed. Tied with a black thread body, silver wire ribbing, and a tungsten bead head, it imitates a midge pupa in the most productive stage of the hatch. The contrast between the dark body and silver ribbing creates a segmented, lifelike appearance that trout find irresistible.
Zebra Midge Variations
- Black Zebra Midge: The classic version. Works in virtually any conditions and is the go-to pattern for most tailwater fisheries.
- Red Zebra Midge: A red-bodied variation that is particularly effective in rivers with high iron content or reddish substrate. Also works well as a bloodworm imitation.
- UV Hot Spot Zebra Midge: A modern variation featuring Gulf UV resin hot spots and a UV Pearl Krystal Flash shuck. The UV elements add a subtle glow that triggers strikes in low-light conditions and deep water.
Stock the essentials: our Size 20 Olive Midges and Size 18 Light Pink Zebra Midges cover the core tailwater midge game — or browse the full Midges collection for the complete range.
Other Essential Midge Patterns
Griffith's Gnat
The Griffith's Gnat is the classic adult midge imitation. Tied with a peacock herl body and grizzly hackle palmered over it, this simple pattern imitates a cluster of adult midges on the surface — a common sight on tailwaters during winter midge hatches. Fish it in the film with a drag-free drift for the best results.
Perdigon Midge
A size 18 perdigon-style midge with a UV resin coating that sinks quickly and imitates a midge pupa in the water column. The slim profile and fast sink rate make it ideal for fishing deep runs where midges are hatching.
Midge Fishing Techniques
The Midge Cluster
During heavy midge hatches, trout often feed on clusters of adult midges rather than individual insects. A Griffith's Gnat fished in the film imitates this behavior perfectly. Look for rising fish and present the fly with a drag-free drift directly in the rise form.
The Midge Pupa Rig
The most productive midge fishing technique is fishing two midge pupae in tandem under a small indicator or as part of a euro nymphing setup. Use a size 18 Zebra Midge as the point fly and a size 18 Red Zebra Midge or Perdigon Midge as the dropper. Set your indicator depth so the flies are drifting just below the surface — that's where trout intercept emerging pupae.
The Dry-Dropper Midge Rig
Trail a size 18 Zebra Midge 12–18 inches below a small, visible dry fly like a Griffith's Gnat. This setup lets you fish both the adult and pupa stages simultaneously and is particularly effective during the transition from pupa to adult.
Tackle for Midge Fishing
Midge fishing requires light, delicate tackle:
- Rod: A 9–10 foot rod in 3–4 weight is ideal for midge fishing. The longer rod helps you achieve a drag-free drift and keep line off the water.
- Tippet: Use 6X or 7X fluorocarbon tippet for midge fishing. The fine diameter is less visible to trout and allows the fly to drift more naturally.
- Hooks: Midge hooks are small (size 18–22) and require a sharp, fine-wire hook for good penetration. Barbless hooks are recommended for easy release.
Final Thoughts
Midge fishing is one of the most rewarding and challenging aspects of fly fishing. The small flies, delicate presentations, and selective trout make it a true test of skill — but the rewards are worth it. Master the Zebra Midge and Griffith's Gnat, and you'll have a productive approach for any tailwater or midge-heavy freestone stream throughout the year. Shop our full Midges collection for the complete tailwater lineup.