Estes Park Fly Fishing Report – April 2026

Updated: April 1, 2026

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Current River Flows

Check real-time streamflows here:
👉 https://waterdata.usgs.gov/monitoring-location/06734900/#parameterCode=00060

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Overview

We’re entering a transitional early spring pattern in the Estes Park area. Flows remain low and clear, and overnight temperatures are still cold enough to create occasional shelf ice in shaded canyon sections.

The most consistent fishing continues to be on the Big Thompson River below Lake Estes, where stable tailwater conditions provide reliable opportunities.

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Big Thompson River (Below Lake Estes)

This stretch is currently fishing best.

Trout are feeding primarily on small subsurface patterns, and success depends on precise presentations and light tackle.

Best Flies:

• Zebra Midge (#20–24)
• Black Beauty (#20–24)
• RS2 (#20–24)
• Pheasant Tail (#18–22)
• BWO Emergers

On overcast afternoons, keep an eye out for Blue-Winged Olive hatches, which can bring fish to the surface.

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Big Thompson Canyon

Conditions are mixed, with some ice still present in shaded areas. Fishing improves during midday when temperatures rise.

Focus on:

• Slower pools
• Protected seams
• Deeper runs

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Rocky Mountain National Park

Fishing remains limited but is gradually improving.

• Moraine Park is beginning to fish during warmer periods
• Lower elevation creeks may open midday
• Most high elevation waters remain frozen

Expect technical fishing with small flies and cautious trout.

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Tips for Current Conditions

• Fish 10am–3pm for best activity
• Use small flies (#20–24)
• Fish light tippet (5x–6x)
• Focus on slow, clean drifts

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Outlook

As April progresses, expect:

• Increased BWO activity
• More consistent fish feeding windows
• Gradual improvement in RMNP access

We’re just at the beginning of the spring fishing season—conditions will continue to improve in the coming weeks.