Fishing at Diamond Lake, Mineral County, Montana

• Overview

  Look for Diamond Lake in the Mineral County part of Montana. It sits in mixed forest. At roughly 19 acres, the whole thing is within casting reach of a single walk. Few waters listed in Mineral County are bigger. Some 26 miles away sits Plains, the nearest settlement. For a city, Spokane is 111 miles off. One jurisdiction covers this water end to end.

• Where to Fish on Diamond Lake

  No chart reached our records; the first cast is your sounding. Read the surface for the wind lane, then fish the edge of it. Still water like this holds fish on the edges rather than out in the open. Public occurrence data for Mineral County names rainbow trout, cutthroat trout, Arctic grayling and brook trout. Read it as a county summary, not a water-by-water list. On Diamond Lake the obvious spot is not always the productive one.

• Seasonal Patterns

  August is the warm end of the year here, averaging about 57°F, while January sits near 20°F. Seasons are distinct, and each one fishes differently. Ice is part of the season here, ending near late April. Averages place the thaw at late April and the freeze at mid November. The weeks after the thaw and the ones before the freeze are the strongest. Diamond Lake fishes to that pattern most years.

• Tackle & Baits

  Whether you may fish here is not something records settle. Public data has parking about half a mile from the shore. Overnight stays are possible about half a mile out, where camping is mapped. Mapping records toilets within half a mile. Rules for this water may differ from the county norm. Where parking is tight, arriving early solves most problems. If the gate is shut, Cliff Lake at 0.9 miles is the nearest alternative. Signs at Diamond Lake carry more weight than any list.