Free Resource · Updated 2026
The most comprehensive fly hatch chart covering 6 major regions and 30+ iconic North American rivers. Browse by region — Rockies, Northeast, Northwest, and more — or jump straight to your target river: Madison River, Beaverkill, Deschutes, Au Sable, Henry's Fork, and beyond. Current month is highlighted so you know exactly what's hatching right now.
A fly fishing hatch chart is one of the most valuable tools in any fly angler's arsenal. Hatches — the emergence of aquatic insects from their underwater larval stage into adult form — trigger some of the most explosive trout feeding behavior of the year. Knowing when hatches occur on your target water is the difference between blind casting and fishing with purpose.
The major hatch groups — mayflies (Blue-Winged Olives, PMDs, Green Drakes, Tricos), caddisflies (Elk Hair, X-Caddis, October Caddis), and stoneflies (Salmonfly, Golden Stone, Skwala) — have predictable seasonal windows, but timing shifts by elevation, latitude, and annual temperature. Use this chart as a guide, then pair it with live river data to know exactly when conditions align.
FlyFishFinder's app gives you real-time USGS gauge intelligence, Prime condition alerts, and live reports from anglers on the water — so you can combine hatch timing with actual river conditions and never miss a hatch again.
See Live River Conditions →FlyFishFinder combines hatch knowledge with live gauge alerts, Prime condition indicators, and real angler intel — so you show up on the right day, not the wrong one.
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