Macarthur Lake in Idaho County: How and When to Fish It

• Overview

  Macarthur Lake is one of the Idaho County waters in Idaho. The water sits 6,946 feet up. It covers about 5 acres, so this is small water you can walk round in under an hour. Nearest town is Hamilton, 53 miles off. Grangeville lies 57 miles off, Kamiah another 62 miles. The nearest edge is a long way off, so local rules apply throughout.

• Where to Fish on Macarthur Lake

  Depth is unknown to us, and the shoreline is the better guide. This is a lake, so the margins and the first drop matter most. Bays and points beat straight shoreline every time on water like this. Open biodiversity records for Idaho County list rainbow trout, Chinook salmon, cutthroat trout, bull trout and brook trout. Several of these carry legal protection or closed seasons; the rulebook comes before the rod. On Macarthur Lake the obvious spot is not always the productive one.

• Seasonal Patterns

  Long-run averages give July about 54°F and December about 18°F. The year splits cleanly: hard water, then open water. The lid arrives early and lasts until roughly early May. The lid tends to go about early May and return around mid November. The weeks after the thaw and the ones before the freeze are the strongest. It sets the rhythm of the year at Macarthur Lake.

• Tackle & Baits

  Public data does not answer the access question here. The map shows no ramp or car park nearby, so this is a walk-in water. Light line and small metal for the trout; a fly rod earns its place on calm evenings. Bank access can be seasonal on ground like this. Signs go up and come down, so check on the day. The nearest alternative is Stillman Lake, 1 mile out. Check the position on Macarthur Lake before loading the car.