Uncompahgre River

The Uncompahgre is really two rivers stitched together at a dam. Up in its headwaters near Ouray it runs orange with iron and heavy metals leached from a century of hard-rock mining — pretty to look at, close to dead as a trout stream. Ridgway Reservoir catches all of that, settles out the metals, and spills clean, cold, temperature-stable water into the tailrace below the dam. That tailwater — locals call it "Paco" after the Pa-Co-Chu-Puk section inside Ridgway State Park — is the reason anyone drives here with a fly rod. It's roughly a mile and a half of engineered pocket water, riffles, and plunge pools holding wild browns that push past 20 inches, stocked and holdover rainbows, and a rotation of retired Snake River cutthroat brood fish dumped in at 18-plus inches. Because it's a true tailwater it fishes clear and ice-free all winter and stays fishable through June runoff, when every freestone in the region is the color of chocolate milk.

Don't come expecting easy. Paco is regularly called one of the most technical fisheries in Colorado, and it earns it. The water is gin-clear, the fish have seen every bead-head in the box, and the productive game is small nymphs — think #20-24 midges and Baetis — fished on 5X-6X fluorocarbon under a tight-line euro rig or a whisper-light yarn indicator. Sight-fishing is the name of the game: you spot individual browns and drift to them, sometimes on leaders 20-plus feet long, staying low and reading water pocket by pocket. Spring flows at the tailwater run a couple hundred CFS and the river drops through fall as feeding lanes open up. There's a quietly good green drake hatch mid-July into early August that most people don't know about, plus summer caddis and PMDs, but the year-round bread and butter is midges.

One honest caveat worth carrying: this river gets marketed as "Gold Medal," and you'll see that claim on shop pages and in magazine features. It is not on Colorado Parks and Wildlife's official Gold Medal list — the trout density sits just under the standard, per CPW and Trout Unlimited. That doesn't make it a bad fishery; it makes it an honest one. Below the state park the river runs through the Billy Creek State Wildlife Area and then into Montrose, where the city has built out a catch-and-release stretch that walk-and-wades beautifully around 250-300 CFS. One thing to watch on the lower river: flows accrete hard below the tailwater — the reach through Colona and Montrose can read 800-plus CFS off tributary and irrigation returns while the tailwater gauge sits near 140, so check 09147025 for the Paco fishery, not a downstream number. RIGS in Ridgway plus Montrose Anglers and Ed's in Montrose are the local intel.