Skip to content

Blue River

14 Day Forecast:  Look for sporadic hatches of midges, caddis, pale morning duns, Tricosm and blue-winged olives

Effective Patterns: #18-20 Mysis Shrimp, #20-22 Mercury Midge, #22-22 Black Beauty, #20-22 Red Larva, #20-22 Manhattan Midge, #20-22 Top Secret Midge, #20 Brassie, #18-20 Mercury Pheasant Tail, #20 Sparkle Wing RS 2, #10 Pat's Rubber Legs, #20-22 Chocolate Foam Wing Emerger, #20 Mathew's Sparkle Dun, #14 Elk Hair Caddis, #16 Pale Morning Dun, and #20 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:

Flows remain low on the Blue River as Denver Water is moving a substantial amount of water back to the metropolitan area via the Roberts Tunnel. Anglers should prepare themselves for hatches of PMD’s, Caddis, Tricos, and Blue-Winged Olives. The lower river is running about 150 cfs (additional water enters via feeder creeks) so it is a better option. Keep an eye on water temperatures, however; and plan to start early and finish early with the low flow regimes. Hopefully Denver Water will start to move some water down the Blue River and the demand in the Front Range will be shifted to Cheesman Dam to supply its water…

Pat Dorsey Fly Fishing