Effective Patterns: #20-22 Mercury Midge, #20-22 Manhattan Midge, #22-24 Chocolate Foam Wing Emerger, #20-22 JujuBaetis, #22 Stalcup's Baetis, #20 Mercury Flashback PT, #20-22 Sparkle Wing RS 2, #18 Micro Egg, #20-22 Griffith Gnat, #20-22 Matt's Midge, #20-22 Mathew's Sparkle Dun, #24 Stalcup's Trico CDC Biot Comparadun, and #20-24 Parachute Adams.
Stream Conditions & Tips from Pat Dorsey for Fly Fishing Cheesman Canyon in Colorado
The picturesque boulder-filled Cheesman Canyon portion of the South Platte River is considered by many one of the most pristine fisheries in the world. This area, often times simply referred to, as “the Canyon” is an experience you’ll never forget. It’s the perfect scenario, magnificent beauty in combination with great fly fishing.
The South Platte River carves its way through a granite canyon lined with ponderosa pines, willows, fallen tree trunks, and various other assorted ground foliages. Boulders as big as Volkswagens Beetles create structure for the super-selective trout residing in the river. Mule Deer, Black Bear, Raccoons, Mountain Lyons, and Bald Eagles all add to the experience. Anglers can expect to catch mostly large rainbows supplemented with a few nice brown trout. The aforementioned “canyon” is as technical as they get, and if you can catch trout here, you can catch them anywhere in the world. This three-mile section is primarily a nymphing fishery requiring tiny midge and mayfly imitations with fine 5 and 6X tippets. Ideal flows for Cheesman Canyon are between 250 and 400 cfs. The regulations are flies and lures only. All fish must be returned to the water immediately.
Cheesman Canyon is one of the best tailwaters in the country. There's a common belief among "canyon regulars" that if you can catch fish on the South Platte River, you can fool fish anywhere in the world. There's no substitution for good technique in Cheesman Canyon.
Tips & Other Information:
Cheesman Reservoir is currently 45 percent full, so Denver Water is keeping the outflows at 80 cfs until further notice. Denver Water said they might drop outflows to 35 cfs, depending on inflows above the reservoir. The tributaries will add a little extra water, but not much to speak of. Anglers should prepare themselves for technical fishing and sporadic midges and blue-winged olive hatches. Flies are of choice are Mercury Midges, Jujubaetis, and Chocolate Foam Wing Emergers. During the “olive” hatches, it’s hard to go wrong with a Mathew’s Sparkle Dun in a size 22. Fishing is fair right now with the low flows; so plan on working hard for your fish. Pray for lots of snow!