Fly Fishing Colorado River - State Bridge to Dotsero

The Colorado River from State Bridge to Dotsero is the remote heart of the "Upper C" — roughly 30 miles of big western freestone flowing through a desert canyon corridor managed almost entirely by the BLM. Where the Pumphouse section upstream draws the crowds, the State Bridge to Dotsero stretch offers solitude, wild trout, and multi-day float trip potential through some of the most dramatic canyon scenery on the river.

Below State Bridge, the river pushes through a narrowing canyon with red sandstone walls, sagebrush benches, and scattered cottonwood groves. The water here is big — base flows run 600-800 cfs in late summer and fall, swelling past 3,000 cfs during spring runoff. Brown trout and rainbow trout averaging 12-18 inches hold in the boulder gardens, deep pools, undercut banks, and sweeping outside bends that define this stretch. Mountain whitefish are common throughout.

Access is primarily by float. State Bridge provides the main put-in, with Catamount Bridge and Burns offering mid-section access for shorter trips. The lower canyon from Burns through Pinball, Horse Creek, and Cottonwood Island to the Dotsero take-out is the most remote reach, with primitive BLM camping at several sites along the way. Wade access is limited to the put-in and take-out areas and a few places where side roads reach the river.

The Salmonfly hatch in late May and early June is the headline event — these giant stoneflies (size #4-6) bring an annual migration of anglers throwing big foam patterns to aggressive trout. Caddis hatches follow through summer, with PMDs and BWOs providing steady dry-fly fishing in the calmer runs. Terrestrial fishing is excellent from July through September, with hoppers and ants effective along the grassy banks and gravel bars. Fall streamer fishing produces the biggest fish, as browns turn aggressive in September and October.

Whether you're running a two-day float from State Bridge to Catamount or a full multi-day trip through to Dotsero, this stretch rewards anglers willing to put in the miles with uncrowded water, wild trout, and a canyon landscape that feels unchanged from the days when only ranchers and prospectors knew this river.