Flowing through Colorado’s stunning Front Range, the Cache la Poudre River is a rugged, scenic waterway known as Colorado’s only Wild and Scenic River.
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Runoff Season Is Here — But So Are the Trout
May on the Cache la Poudre means one thing: runoff. Flows are rising, clarity is dropping, and the river’s energy is unmistakable. But don’t let the murky water fool you—this is prime time for targeting aggressive trout with big bugs and bold tactics.
The canyon is fishing best early to mid-afternoon, especially near the banks where slower water holds fish seeking refuge from the current. Nymphing with stonefly patterns and trailing flashy droppers is producing, and streamer anglers are finding success with dark, articulated patterns
Conditions Summary
Flow Rate: 1,160 CFS at the canyon mouth; ~593 CFS in Fort Collins
Water Temp: 48°F at Poudre Park
Air Temp: 49°F in Poudre Park
Clarity: Off-color, especially below the South Fork confluence
Best Times to Fish: Late morning to mid-afternoon
Cache la Poudre Hatch Chart
March
Midges, BWOs, Stoneflies
Recommended Patterns: Black Beauty (#20–24), Blue Wing Olive (#18–22), Pat’s Rubber Legs (#10–12)
April
Baetis, Caddis, Midges
Recommended Patterns: Elk Hair Caddis (#16–18), RS2 (#20–22), San Juan Worm (#12–14)
May
Caddis, Stoneflies, Golden Stones
Recommended Patterns: Elk Hair Caddis (#14–16), Golden Stone Nymph (#8–12), Prince Nymph (#14–16)
Top 3 Flies for the Month
Dry Fly: Elk Hair Caddis (#14–16) – Drift along banks during afternoon hatches.
Nymph: Golden Stone Nymph (#8–12) – Dead drift through deeper runs.
Streamer: Black Woolly Bugger (#6–8) – Swing through slower pools and eddies.
Tips Fly Fishing on the Cache la Poudre
Seasonal Tip: Runoff has increased flows and reduced clarity, but trout remain active. Focus on slower water near banks and behind structure.
Dry Fly: Look for rising fish during afternoon caddis hatches. Use buoyant patterns like the Elk Hair Caddis.
Nymphing: Employ a two-fly rig with a heavy stonefly nymph and a flashy dropper. Adjust weight to reach deeper holding water.
Streamer Fishing: Use dark-colored streamers with a slow retrieve in off-color water. Target seams and slower currents.
Access Points
Poudre Canyon Mouth
Why Fish Here: Accessible waters with diverse holding spots.
Google Maps
Parking: 4/5
Wading: 3/5
Trail Access: 4/5
Pro Tip: Focus on bank-side pockets during higher flows.
Hewlett Gulch Bridge
Why Fish Here: Productive runs and pools.
Google Maps
Parking: 2/5
Wading: 2/5
Trail Access: 3/5
Pro Tip: Use caution during high water; fish closer to the bank.
Poudre Park
Why Fish Here: Consistent flows and accessible terrain.
Google Maps
Parking: 4/5
Wading: 4/5
Trail Access: 5/5
Pro Tip: Ideal for afternoon dry fly action during caddis hatches.
Local Regulations and Notes on Landowner Rights
Be aware of private property boundaries along the river. Always obtain permission before accessing private lands. Adhere to local fishing regulations and practice Leave No Trace principles.
FAQ on this Spot
Is the Cache la Poudre fishable during runoff?
Yes, focus on slower water near banks and use larger, more visible flies.
What are the best flies to use in May?
Elk Hair Caddis, Golden Stone Nymphs, and Black Woolly Buggers are effective choices.
Are there any safety concerns during high flows?
Yes, exercise caution when wading, as higher flows can be dangerous. Always wear a wading belt and consider using a wading staff.