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Blue River

Angler pulls fish out of his net in the middle of the Blue River with forested background

14 Day Forecast:  Look for good flows and hatches of caddis, PMD's, yellow sallies, and green drakes.

Effective Patterns: #18-20 Mysis Shrimp, #20-22 Medallion Midge, #20-22 Mercury Midge, #22-22 Black Beauty, #20-22 Red Larva, #20-22 Manhattan Midge, #20-24 Top Secret Midge, #20 JujuBaetis, #18-22 Mercury Flashback Pheasant Tail, #22-24 Chocolate Foam Wing Emerger, #18 Hot Tail Flash Egg, #20-24 Griffith Gnat, #22-24 Matt's Midge, #22-26 Parachute Adams.

Measurements

Get Information for Fly Fishing on the Blue River Near Frisco, CO by Pat Dorsey

Many anglers I know have a love-hate relationship with the Blue River. Just about the time you think you have the river figured out, a humbling experience devastates your ego. The Blue River is a fantastic fishery and a favorite of mine. The Blue certainly is a beautiful as they come, and gives visiting anglers a real sense of Colorado. It’s a tough river at times, but a good challenge will always make you a better fly-fisherman. The water is extremely cold coming off the bottom of Lake Dillon. This cold water dictates and controls the feeding window of the trout. It’s not a great morning fishery, but as the water gradually warms up throughout the day, the fishing improves dramatically. The upper stretches of the Blue (from the base of the dam through Silverthorne) holds trophy trout, fattening up on Mysis Shrimp from the lake above. The water is gin clear requiring perfect presentations. Down stream the river changes back in a typical mountain trout stream with a diverse insect life. Several tributaries inter the river before it spills into Green Mountain Reservoir.

The river is  lined with cottonwood trees and willows and is tucked to the east of the beautiful Gore Range. Because the water is so cold the river fishes best from mid-day to dark. Anglers can expect to catch mostly brown trout, a hand full of cut-bows as well as a few rainbows and the river can be excellent with dry fly patterns later in the afternoons and evenings. The hatches include blue wing olives, caddis, red quills, green drakes, pmd’s, and stoneflies. The regulations are catch and release in Silverthorne and on the lower reaches the limit is two trout over 16 inches in length and is artificial flies and lures only.

Tips & Other Information:

The Blue River in the town of Silverthorne is your best bet during run off. Dillion is full (101%) so look for above average flows for a while. Effective patterns include Mysis Shrimp, egg patterns, San Juan Worms, trailed by small bead heads, and mayfly nymphs. Look for run-off to peak soon and for flows to recede and fishing to pick up nicely. The lower river is shaping up nicely, but still around 800 cfs. Once it drops to 600 cfs, anglers can get around a bit easier. Look for strong caddis hatches on the lower river…

Pat Dorsey Fly Fishing