Cheesman Canyon Fly Fishing Report – October Conditions & Top Flies

  • October 8, 2025


South Platte River Fly Fishing Report Cheesman Canyon-1

Cheesman in October is like fishing through a whisper — every cast matters and the trout hear EVERYTHING. You’ll earn every strike here this month, but when one smacks your emerger in a quiet seam? That’s the kind of day you remember.


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Conditions at a Glance

rise beyond fly fihsing company in denver colorado a guide rating for a stream. Good is 5 trout. This rating is for 3 trout. So good or semi challenging fishing conditions.

  • Flow: ~120 CFS below Cheesman Dam ⬇
  • Water Temp: ~50 °F (holding steady)
  • Air Temp: 35–68 °F
  • Clarity: Very clear
  • Pressure: High (trailheads see traffic, canyon narrows)
  • Best Times: 10 AM to 3 PM — when BWOs hatch and trout move
  • Dry Fly Score: ⭐⭐☆
  • Nymph Score: ⭐⭐⭐⭐
  • Streamer Score: ⭐⭐

Flows are low and forgiving, but clarity is brutal — even a tiny drag or flash kills your chances. BWOs dominate the hatch window, and midges fill the gaps. Fish smart, move quietly, and let your flies do the whispering.

DECKERS WEATHER

 


Hatch Chart – October

Hatch Size When to Fish How to Fish Notes
BWOs #20–22 10 AM–3 PM Sparkle Dun, Barr’s Emerger, soft-hackle swings The marquee hatch — trout key hard to it on cloudy or shaded days
Midges #22–26 All day Zebra Midge, Top Secret Midge, WD-40 under indicator Go-to when nothing else is happening
Tricos #22–24 8–10 AM (warmer mornings) CDC Spinner, Trico Comparadun Fading, but still shows up on warm, calm starts

📥 Download the Full South Platte Hatch Chart PDF 

 

 

Top 3 Flies for the Month

  1. Dry Fly: Hi-Vis BWO Parachute #20–22 or CDC Trico Spinner #22–24
  2. Nymph: RS2 #22, Barr’s BWO Emerger #20–22, Black Beauty / Zebra Midge #24
  3. Streamer: Mini Leech #10, Thin Mint Bugger #12
 

 


Tips Fly Fishing Cheesman Canyon

  • Approach slow and quiet — shadows, gear noise, splash… they all kill it.
  • Use long leaders, fine tippets (6–7X), and subtle indicators or emerger rigs.
  • Favor mid-column presentations during BWOs — emerger or soft-hackle often wins.
  • Midge rigs shine when the hatch is off.
  • On cloudy or dusk light, swing small leeches or soft hackles near structure.
  • Walk past the obvious holes — the less pressured water often hides better fish.


Access Points

Access Point Description Why Fish Here Parking Wading Trail
Gill Trailhead Main access Near the canyon’s heart — high traffic Limited Moderate Strenuous
Upper Canyon Above dam area More solitude, hidden runs Moderate Easy Steep hike
Lower Canyon Toward Deckers confluence More forgiving water & structure Good Moderate Moderate

Local Regulations & Landowner Notes

  1. Artificial flies and lures only.

  2. Catch-and-release encouraged, especially on larger browns.

  3. Stay on trails and respect private property near access points.

  4. Weekends see heavy use — consider midweek or early starts.


FAQ on this Spot


When is lunch-hour fishing best?
Aim for 10 AM to 3 PM — that’s your BWO window.
Drys worth throwing?
Yes — but only to rising trout during strong hatch moments.
What’s my go-to nymph rig?
RS2 + Emerger or small midge dropper, subtle split shot, long leader.
Do streamers ever work?
Occasionally — near structure or in low light.
Best trailhead for solitude?
Upper Canyon or farther down; Gill gets busy.
What tippet sizes are safe bets?
6–7X for dries & nymphs; 5X for small streamers.
How spooky are trout now?
Extremely — even shadows and bright gear kill chances.
Era of fish size?
Expect 14–18″ browns, with occasional bruisers pushing the seam lines.
Animas River (1600 x 900 px) (12)
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