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Oregon · spring creek · Rainbow Trout, Brown Trout, Redband Rainbow
No USGS gauge linked to this river.
| Month | Insect | Size | Pattern |
|---|---|---|---|
| May | PMD | #16-18 | PMD Sparkle Dun |
| Caddis | #14-16 | Elk Hair Caddis | |
| June | PMD | #16-18 | Parachute PMD |
| Green Drake | #10-12 |
| Comparadun Green Drake |
| July | PMD | #16-18 | PMD Cripple |
| Callibaetis | #14-16 | Callibaetis Sparkle Dun |
| Blue-winged Olive | #18-20 | Parachute BWO |
| August | Trico | #20-24 | Trico Spinner |
| Callibaetis | #14-16 | Callibaetis Spinner |
| September | Trico | #20-24 | Trico Spinner |
| Blue-winged Olive | #18-20 | Parachute BWO |
| October | October Caddis | #8-10 | October Caddis Dry |
| Blue-winged Olive | #18-20 | CDC BWO |
The Williamson River is Oregon's great trophy trout river — a spring-fed system flowing through the Klamath Basin that produces wild Redband rainbow trout of a size that stops conversations. This is a river where a 10-pound native rainbow is a real possibility, where 20-inch fish are common, and where the largest residents push well past 24 inches. If the Pacific Northwest has a spring creek with Montana-caliber fish, it's the Williamson.
Fed by springs originating near Klamath Marsh in the upper reaches, the Williamson flows south through Chiloquin and eventually empties into Upper Klamath Lake. The river's two personalities define its fishing strategy. The upper Williamson above Chiloquin flows through meadow banks and ponderosa pine forests, with wading access and relatively clear pools. The lower river below Chiloquin runs deeper and slower, moving through a series of long, glassy flats and undercut banks where the biggest fish lurk — drift boats and pontoon craft are the preferred platforms here.
The Williamson's Redband rainbows are a genetically distinct subspecies of the Great Basin — stockier, deeper-bodied, and more brilliantly colored than coastal rainbows. Three-year-old fish routinely exceed 20 inches. These fish are wild and smart, educated by years of clear-water fishing pressure. They rise selectively to hatches but will also respond to properly presented streamers during low-light periods and to large nymphs fished tight to the bottom.
Hatches drive the dry fly fishing calendar. Pale Morning Duns emerge through June and July, often producing selective surface feeding in the flats. Callibaetis hatches occur on the slower lower sections. October Caddis — a massive orange caddisfly — produces some of the most exciting dry fly fishing of the year when it appears in fall, with large rusty-orange patterns drawing violent strikes from big fish. Trico spinners in August and September can bring pods of risers to the surface in the early morning flat light.
Brown trout appear primarily in the lower river below Spring Creek, growing fat on the abundant baitfish and invertebrate populations. These fish are less commonly targeted but can be encountered with streamers on the lower river in fall.
The Chiloquin area provides the most practical base for fishing. The town sits at the heart of the Williamson, with the Agency Lake arm accessible nearby. The Klamath Tribes hold significant management authority over this watershed, and anglers should check current tribal and ODFW regulations carefully before fishing, as access rules and seasonal closures can vary. The Williamson is worth every effort — giant wild trout on a spring creek in a landscape that feels timeless.
Check current ODFW regulations and Klamath Tribes fishing regulations before fishing — tribal authority governs portions of the watershed. Some sections require tribal fishing permits. Catch-and-release regulations apply on select sections. Lost River suckers are protected and cannot be retained. Seasonal closures may apply to protect spawning fish. Confirm current rules at the ODFW office in Klamath Falls.
Public access at Chiloquin along the Williamson. Bridge crossing provides good access to the mid-river section. Multiple pullouts along Chiloquin Ridge Road. Good wading near town.
Upper Williamson access via Kirk Road. Wading water with classic spring creek character — meadow banks, clear pools, selective fish. Less pressure than lower sections.
Lower river access near the Klamath Lake arm. Drift boat put-in/take-out. Bigger water with larger fish but requires a boat for most of the best runs.
Private and tribal land surrounds much of this area — confirm access before approaching. Spring Creek enters here and the brown trout population increases below this point.
