Cheesman Canyon is the most technical stretch of the South Platte River near Denver, especially in winter. Low clear water, heavily pressured trout, and steep canyon walls create a fishery that rewards patience and precision.

Updated: May 13th 2026

Cheesman is in a strong May transition window. Fish are more active than they were in early spring, but the canyon remains clear, technical, and pressured. Midday is still your best window, especially on cooler or overcast days when BWO activity can pull fish into softer seams and tailouts.

Flows are expected to move around as upstream reservoir management affects the South Platte system, so do not treat this like a static tailwater day. Start precise, stay light, and adjust depth before you start blaming your fly box.

Micro Tailwater Nymphing With BWO Windows

BWOs, Baetis, Midges

Early Caddis

• Black Beauty #20-22
• Sniper Baetis #20
• Mole Fly #20-22

Cheesman Micro-Drift Refusal Rig

• Indicator: Micro yarn indicator or small dry-dropper indicator
• Lead Fly: Sniper Baetis #20
• Dropper: Black Beauty #22
• Weight: Micro shot only if needed
• Spacing: 18-22 inches between flies
• Leader Length: 10-12 ft minimum
• Target Water: Slow seams, glassy transitions, shelves, and soft tailouts

Micro Tailwater Nymphing With BWO Windows

BWOs, Baetis, Midges

Early Caddis

• Black Beauty #20-22
• Sniper Baetis #20
• Mole Fly #20-22

Cheesman Micro-Drift Refusal Rig

• Indicator: Micro yarn indicator or small dry-dropper indicator
• Lead Fly: Sniper Baetis #20
• Dropper: Black Beauty #22
• Weight: Micro shot only if needed
• Spacing: 18-22 inches between flies
• Leader Length: 10-12 ft minimum
• Target Water: Slow seams, glassy transitions, shelves, and soft tailouts

Still early spring patterns. Fish deeper early, adjust slightly higher as temps rise.

Possible, but technical and short-lived. Don’t rely on it.

Primary method. Light tippet, small flies, perfect drifts.

Limited but can work in deeper structure during lower light.

Gill Trail Access | 📍 Locals Rating ⭐️⭐️⭐️⭐️⭐️ 5.0
Classic canyon entry with access to prime technical water and holding fish.

Cheesman Canyon Trailhead | 📍 Locals Rating ⭐️⭐️⭐️⭐️⭐️ 5.0
Main access to the canyon with consistent runs, seams, and deeper structure.

Lower Canyon Stretch | 📍 Locals Rating ⭐️⭐️⭐️⭐️ 4.5
Less pressured water with strong holding lies and transition zones.

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Regulated by Colorado Parks and Wildlife

• Artificial flies and lures only
• Catch and release enforced in most sections
• Barbless hooks recommended
• Respect all posted boundaries and access points

Is Cheesman Canyon fishing good right now?
Yes, but it’s technical. Fish are feeding midday, but presentation has to be perfect.

What flies should I use in Cheesman Canyon?
Small midge and baetis patterns like Top Secret Midge, Juju Baetis, and RS2 are key.

What is the best time of day to fish Cheesman Canyon?
Late morning through mid-afternoon offers the most consistent activity.

Where should I fish in Cheesman Canyon?
Focus on deeper runs, seams, and slower glides where fish can hold comfortably.

Is Cheesman Canyon good for beginners?
No. This is highly technical water better suited for experienced anglers.

Do I need a guide for Cheesman Canyon?
Not required, but strongly recommended if you want to shorten the learning curve.