Patagonia is famous for being a dry fly destination — but the full picture is more nuanced than that. The right fly selection depends on the time of season, the type of water you’re fishing, and whether you’re on a river or a lake. For the full picture of the destination, see our complete guide to fly fishing in Northern Patagonia.
The Short Version
If you could only bring one type of fly to Patagonia, bring large foam dry flies. Patagonian trout are aggressive, opportunistic, and accustomed to eating big. A well-rounded box with streamers and a few nymphs will dramatically improve your results across different conditions.
Dry Flies
The Fat Albert is the single most important fly you can bring. Available in black, brown, tan, and pink, sizes 6 to 10 cover most situations. The Gypsy King is another essential — its foam body, elk hair, peacock, and rubber legs make it visible in large rivers and lakes. Beetles and ants are extremely productive throughout the season. The dragonfly hatch runs December through January on lakes near San Martín de los Andes — pack dragonfly imitations if your trip falls in this window.
Nymphs
The Beadhead Pheasant Tail is the workhorse nymph of Patagonia. Fish it as a dropper under a dry or swing it across the current. The Girdle Bug in black, brown, or olive works well as a dropper in most rivers and lakes.
Streamers
Woolly Buggers in olive, black, and brown in sizes 4 to 8 are the foundation of any streamer box. Baitfish imitations in gold, white, and olive are effective for large brown trout in the bigger rivers like the Chimehuin and Collon Curá.
The Willow Worm
The willow worm hatch occurs on specific rivers — particularly the Collon Curá — when willow catkins fall into the water in spring. A San Juan Worm in green or yellow, fished dead-drift, can be extraordinarily productive during this event.
Practical Packing List
Dry flies: Fat Alberts (black, tan, pink — sizes 6-10), Gypsy Kings (sizes 8-12), beetles and ants (sizes 10-16), dragonfly imitations if visiting December-January. Nymphs: Beadhead Pheasant Tail (sizes 12-16), Girdle Bug (sizes 4-10). Streamers: Woolly Buggers (olive, black, brown — sizes 4-8), baitfish patterns (sizes 2-6). Extras: San Juan Worm in green and yellow. For the full gear checklist, see our packing list for Patagonia.