Fishing Twentymile Slough in Lake County, Oregon

• Overview

  Twentymile Slough lies in Lake County, Oregon. The bank is 4,482 feet above sea level. Surface area runs to roughly 419 acres, so plan for one area rather than the whole. The full circuit measures close to 2.8 miles on foot. On our Lake County list it sits near the top for size. Lakeview lies 27 miles from the water. After that come Alturas at 58 miles and Altamont at 98 miles. No boundary runs near, so the county rules hold throughout.

• Where to Fish on Twentymile Slough

  There is no recorded depth, so work from what you can see. The productive water is a rod length or two out, not a hundred. Read the surface for the wind lane, then fish the edge of it. Records held for Lake County cover rainbow trout, Sacramento sucker, warner sucker and brown bullhead. The list covers the county rather than this water alone, so treat it as a guide. Twentymile Slough fishes better once you know its edges.

• Seasonal Patterns

  In an average year August sits at 68°F and January at 32°F. The year gives four workable seasons without severe ends. In a normal year the cover is thin and short-lived. March through May is the strongest run, with October and November a second stretch. On Twentymile Slough that shapes the whole year.

• Tackle & Baits

  Nothing we hold confirms whether access is permitted. It is an impounded water, so levels are managed and can shift through the year. Mapping flags this water as intermittent: it can be dry for part of the year, so check before travelling. Formal access is not mapped, so the last stretch is likely on foot. Take the rules with you rather than trusting memory. Where tickets apply, they are sold in the nearest town rather than on the bank. Should this one be busy, Greaser Lake is 1.3 miles off. Confirm before you fish Twentymile Slough.