Crooked River Fishing Report – September 25, 2026: BWOs Rising & October Caddis Arriving

Conditions & Overview

If you've been sleeping on the Crooked River this fall, it's time to wake up — it's fishing beautifully right now. The wild and scenic tailwater below Bowman Dam is running low and crystal clear at approximately 100–120 cfs in the prime fly fishing reach (Bowman Dam to approximately Mile Marker 12 near Terrebonne and Crooked River Ranch). Prineville Reservoir is sitting at a sobering 26% capacity, which means flows have been slowly dropping through September and will likely continue that downward trend. For anglers, that translates to increasingly clear, low water and selective fish that demand a careful approach — and richly reward those who deliver one.

Water temperatures are a comfortable 55°F — squarely in the productive feeding zone for the wild redband rainbows and mountain whitefish that make this canyon one of Central Oregon's premier fly fishing destinations. These fish are actively feeding, and the overcast conditions forecast for today are triggering excellent hatch activity through the morning hours.

A note on the USGS gauge: USGS Gauge 14087400 is located below Opal Springs (near Culver), which is downstream of the prime fly fishing stretch. Opal Springs contributes enormous spring volume to the lower river, along with a regular hydroelectric pulse cycle — which is why the gauge reads ~1,230 cfs even as the Bowman Dam tailwater section runs ~100–120 cfs. Both readings are accurate; they're measuring very different parts of the same river.

What's Hatching

Blue-Winged Olives (BWOs, size #20) are the star of the show. Consistent hatches are occurring from mid-morning through early afternoon — especially welcome on overcast days like today. Fish are rising visibly in the slower pools and glassy flats throughout the canyon. The Big Bend Campground area and the Chimney Rock stretch are both seeing solid surface activity; approach from downstream and keep a low profile.

October Caddis are beginning to appear in the bankside willows and grasses — the big, rusty-orange ones that signal the Crooked River's most exciting dry-fly period of the year. Full surface rises haven't materialized yet, but swinging orange soft hackles and early October Caddis patterns on a 3-weight trout spey setup is already finding willing fish. Now is the time to load up your box.

Midges are ever-present on the Crooked — year-round producers that bridge every gap between hatches. Black caddis (size #16) remain active through midday, and a few tan caddis can also be found. Fish are opportunistic and looking up.

Top Fly Recommendations

Dry Flies:

• Parachute Adams (#18–20) — a perfect BWO stand-in; the high-vis white post makes it easy to track in the glassy flats where fish are rising. A Crooked River essential.
• Elk Hair Caddis (black or tan, #16–18) — covers the black caddis hatch and functions as an excellent searching pattern between rises

Nymphs:

• Pheasant Tail Nymph (#16–20, slim profile) — a deadly BWO emerger imitation; fish just below the surface film during hatch windows, or deep on a tight-line rig in the runs
• Zebra Midge (#20–22, black/silver) — the Crooked River's bread-and-butter pattern. Works all day, any day, any season. Don't leave the car without a dozen.
• Copper John (#16–18, red or copper) — heavy enough to get down in clear water; excellent as the dropper in a dry-dropper setup below a Parachute Adams

Streamers & Swings:

• Woolly Bugger (black or olive, #10–12) — swing through deeper canyon slots or dead-drift through pools. Aggressive fish will track and crush this pattern. A top choice as October Caddis begin their migration and fish key on larger prey.

Best Access Points & Tactics

The prime stretch runs from Bowman Dam (Prineville Reservoir outlet) downstream approximately 10–12 miles. Key access points along Highway 27 between Prineville and Terrebonne include Big Bend Campground, Chimney Rock, Lone Pine, and numerous BLM pullouts. The Crooked River Ranch area near Terrebonne provides access to quality lower-section water as well.

At 100–120 cfs in crystal-clear water, stealth is your single most important skill. Long leaders (12–15 ft), 5X–6X fluorocarbon tippet, and upstream presentations are non-negotiable. Minimize false casts — shadows and line flash spook fish in this low, clear water. Wear earth-tone clothing, approach pools from downstream, and stay low.

The smooth basalt riverbed is legendary for its slickness — studded felt soles and a wading staff are strongly recommended. Take your time on every step.

Hazards & Closures

• ⚠️ Extremely slick basalt bottom — wading staff and studded/felt boots are essential, not optional
• ⚠️ Prineville Reservoir at 26% capacity — flows may continue to drop through fall; check current conditions before each trip
• Big Bend CG upper section — late spawners may still be present; observe any posted closures and avoid wading through redd areas
• Verify current ODFW regulations for this Wild & Scenic river section before fishing
• It's a Friday — expect higher weekend traffic. Arrive early to secure your preferred run.

Flow/temp data: USGS Gauge 14087400 (Crooked River below Opal Springs, near Culver, OR) — provisional, 9/25/2026. Tailwater section flows per Confluence Fly Shop field report (9/18/2026). Always verify current regulations with ODFW before fishing. Tight lines!