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Elk Hair Caddis, Parachute Adams, Pheasant Tail Nymph, Zebra Midge, Copper John, Woolly Bugger, Chubby Chernobyl

Crooked River Fishing Report — August 18, 2026

Below Bowman Dam | Chimney Rock Section | Terrebonne / Crooked River Ranch Area

Current Conditions Overview

The Crooked River is running at elevated flows this morning. The USGS gauge (14087400) below Opal Springs near Culver is recording 1,230 CFS — notably higher than typical late-summer levels for this tailwater, likely reflecting increased releases from Prineville Reservoir (Bowman Dam) combined with Opal Spring contributions. Anglers should expect faster, deeper water than normal through the Chimney Rock section. That said, water temperature is an outstanding 55.6°F (13.1°C), which is ideal for trout and means fish are actively feeding throughout the day. Monitor flows before wading — higher water is moving with real authority in the canyon.

Water Clarity & Flow

Clarity is slightly off-color in the main channel due to elevated dam releases, though the river is not blown out. The Crooked’s tailwater character means it clears quickly; pocket water near canyon walls and slower inside bends may offer better visibility for sight-fishing. At 1,230 CFS, confident waders with studded boots can still access many classic runs, but less experienced anglers should stick to the wider, shallower sections near Terrebonne and Crooked River Ranch where the gradient mellows.

Hatch Activity

Despite the elevated flows, bug activity on the Crooked remains solid heading into the second half of August:

• Caddis (#16–18): The most exciting recent development — both small black caddis and slightly larger tan caddis are increasingly active. Expect adult activity in late afternoon through early evening. Caddis pupa patterns are deadly throughout the day.
• Pale Morning Duns (#16–18): PMDs have been showing up in greater numbers since early August, with best dry-fly action from late morning through early afternoon and continuing into the evening hours.
• Midges (#20–24): The Crooked’s year-round staple. Reliable at any flow level — fish them all day in the softer seams and slack water behind boulders.
• Scuds: A go-to subsurface option year-round on this spring-fed tailwater. Olive and tan scud imitations (#14–18) produce fish all day, especially in deeper runs.

Top Fly Recommendations

Dry Flies: The Elk Hair Caddis (#16–18, tan or black) is your best bet when adults are on the water in the afternoon and evening. The Parachute Adams (#16–18) covers PMD activity beautifully and is a confidence fly when you can’t quite identify what’s hatching. Try a Chubby Chernobyl (#14) as a dry-dropper indicator with a nymph trailer through the faster water at these elevated flows.

Nymphs & Subsurface: The Pheasant Tail Nymph (#16–18) is an excellent PMD nymph imitation and should be in every Crooked River box. The Zebra Midge (#20–22) and Copper John (#16–18) are highly effective nymphing options in the deeper, faster runs at current flows. For something to swing through the seams, the Woolly Bugger (#8–10, olive or black) can entice aggressive strikes from larger wild redband rainbows holding in the deeper canyon pools.

Best Access Points

• Chimney Rock Area (BLM): The premier access point for the upper tailwater section closest to Bowman Dam. Take Hwy 27 south from Terrebonne; BLM trailhead parking is well-marked. A short hike puts you on world-class wild redband water.
• Crooked River Ranch (Lower Section): Accessible via Chinook Drive off Hwy 97. Several BLM access points along the canyon road provide walk-in access to productive water with somewhat gentler gradient.
• Lower Access near Hwy 97: Quick roadside access for those stopping on the way through Terrebonne; good midge and scud water even at elevated flows.

Hazards & Notes

Elevated flows advisory: At 1,230 CFS (USGS gauge, provisional), the Crooked is running above its typical summer level. Exercise caution when wading — use a wading staff, stick to known shallow crossings, and never wade alone. The Chimney Rock canyon section has no easy escape routes once you’re in the gorge — plan accordingly. Water temps at 55.6°F are ideal for trout health and aggressive feeding, so fish welfare is excellent for catch-and-release. No reported closures as of this report — always verify with ODFW before your trip.

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