Fishing at Trailerhouse Reservoir, Valley County, Montana

• Overview

  Trailerhouse Reservoir sits in Valley County, out in Montana. Elevation runs to 2,434 feet. The water measures roughly 5 acres, so nothing here is far from anything else. It lies lower than most water we list in Montana. Glasgow sits 26 miles from the bank. Billings sits 175 miles out, and it is the nearest city worth the name. The nearest edge is a long way off, so local rules apply throughout.

• Where to Fish on Trailerhouse Reservoir

  No chart reached our records; the first cast is your sounding. Points where the flooded channel swings in are the reliable ones. Look for where the old bank line still shows under the surface. Reported across Valley County: Chinook salmon, northern pike, cisco, walleye and yellow perch. Several of these carry legal protection or closed seasons; the rulebook comes before the rod. On Trailerhouse Reservoir the obvious spot is not always the productive one.

• Seasonal Patterns

  Between January at about 14°F and July at about 71°F, the water has a wide range to work through. The year splits cleanly: hard water, then open water. The lid usually goes in early April, which opens the strongest weeks of the year. The season between ice runs from about early April to late November. September and October fish steadily right up to the freeze. Trailerhouse Reservoir fishes to that pattern most years.

• Tackle & Baits

  We hold no note on access for this one. Mapped as intermittent, it fills after rain and shrinks between. We find no slipway, car park or made path within a short radius, so treat access as rough. Largemouth respond to soft plastics tight to cover; go weedless where the growth is heavy. Bank access can be seasonal on ground like this. Check whether bait restrictions apply before you buy any. If the gate is shut, Badger Reservoir at 3.5 miles is the nearest alternative. Ask locally about Trailerhouse Reservoir if anything is unclear.