Bergman Reservoir near Ashton: Fishing Spots, Seasons and Access

• Overview

  In Idaho, Bergman Reservoir falls inside Fremont County. It stands 6,375 feet above sea level. Roughly 37 acres: a morning covers one end, an afternoon the other. Ashton at 20 miles is the nearest place to stop. The nearest city of size is Billings, 172 miles away. The county line is nowhere near, so one local authority covers the water.

• Where to Fish on Bergman Reservoir

  Depth figures are not published for this one. The old creek line under the surface is the feature worth finding. Built water gives depth close in, which suits a bank angler. Fremont County records list rainbow trout, cutthroat trout and brook trout among the fish reported. Several of these carry legal protection or closed seasons; the rulebook comes before the rod. Work Bergman Reservoir in sections rather than trying to cover it.

• Seasonal Patterns

  Temperature averages peak at 60°F in July and bottom out at 18°F in December. Cold locks it up for a good stretch each year. Once it clears, about late April, the fishing comes on quickly. Expect the water usable from around late April until roughly mid November. Reckon on open water from spring through to late autumn, with May and June the strongest. Plan around that when you fish Bergman Reservoir.

• Tackle & Baits

  Public sources are silent on who controls the bank. Access is unmapped, which usually means a farm track and a walk. Light line and small metal for the trout; a fly rod earns its place on calm evenings. Parking is often the real limit rather than the bank itself. Rules for boats are stricter than rules for the bank in many places. The nearest alternative is Indian Lake, 0.8 miles out. Where Bergman Reservoir is concerned, a local answer beats a written one.