Pat Dorsey’s Fishing Report: Cheesman Canyon – South Platte

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.

Current Conditions 

Clarity: Excellent

14 Day Forecast: Anglers should prepare themselves for hatches of midges, blue wing olives, tricos and sporadic October caddis.

Tips and Other Information: We recently saw a bump in flows coming out of Cheesman over the weekend which had some fish moving around the system but we are back down to right around 150 cfs. The good news is that Cheesman Reservoir is staying full, currently it is at 98% capacity! Denver Water is sending water via the North Fork of the South Platte through the Roberts Tunnel to meet downstream demand. Dillon Reservoir is dropping fast, in fact; it’s down to 93% capacity, so look for Denver Water to begin relying on Cheesman’s storage soon. Anglers should prepare themselves for excellent a.m. midge hatches. Later in the afternoon, blue-winged olives make their presence known and the fish key on Baetis nymphs for a few hours. The primary food source is going to be baetis and midge larva and emergers. In the slower pools and tailouts, savvy dry fly enthusiasts are finding some nice fish rising to “olives.” It’s hard to go wrong with a Mathew’s Sparkle Dun for these surface feeders… Please keep an eye out for spawing browns and avoid walking on/fishing redds!

Effective Patterns: #22-24 Chocolate Foam Wing Emerger, #18 Hot Tail Flash Egg, #24 Black Beauty, #24 Top Secret Midges, #12-16 Mayers Leech, #20 JujuBaetis, #22 Stalcup’s Baetis, #18-20 Mercury Flashback Pheasant Tail, #20-22 Sparkle Wing RS 2, #20-22 Mercury Midge, #20-22 Manhattan Midge, #20 Mathew’s Sparkle Dun, #20 Stalcup’s CDC Biot Comparadun, #22-24 Matt’s Midge, #22-24 Griffith Gnat, and #20-26 Parachute Adams.