Peterson Lake Fishing Guide, Beaverhead County, Montana

• Overview

  Peterson Lake is set in Beaverhead County, Montana. The surface lies 7,818 feet up. About 9 acres of surface, which puts the far bank inside easy sight. Salmon is the closest place, 28 miles off. Dillon lies 33 miles off, Challis another 65 miles. Also worth knowing: Selway Lake the better part of 2.5 miles, 6.2 miles away is Mud Lake, Harrison Lake the better part of 7.6 miles, 7.9 miles away is Reservoir Lake and Blanchard Pond the better part of 9 miles. There is no boundary nearby to worry about.

• Where to Fish on Peterson Lake

  The records we hold are silent on depth, so plan to find it yourself. The shallow end warms first and pulls fish in ahead of the rest. Weed, then depth: that is the order to fish a water of this kind. Public occurrence data for Beaverhead County names rainbow trout, brook trout, brown trout, cutthroat trout and Arctic grayling. The county list is broader than any single water. Work Peterson Lake in sections rather than trying to cover it.

• Seasonal Patterns

  Temperature averages peak at 54°F in July and bottom out at 18°F in January. Fishing here follows the temperature more than the calendar. Ice fishing carries the winter, and the water opens about mid May. In an average year the thaw lands around mid May and the freeze near mid November. The shoulder weeks of the open season are the productive ones. Peterson Lake runs to that rhythm year in and year out.

• Tackle & Baits

  Public data does not answer the access question here. Public data shows nothing built here, so treat the whole approach as informal. For the trout, small spinners and a box of nymphs cover both approaches. Rules for this water may differ from the county norm. Close seasons apply to some species and not others. Selway Lake sits 2.5 miles off and takes the overflow. The position on Peterson Lake is worth confirming on the day.