O'Brien Lake in Iron County: How and When to Fish It

• Overview

  O'Brien Lake is one of the Iron County waters in Wisconsin. The bank gives way to pine and birch. Around 76 acres of surface means several distinct areas to work. The bank runs about 2.0 miles all the way round, so one visit can cover most of it. Compared with other Wisconsin water on our list, it sits high. For supplies, Hurley is 15 miles out. Thunder Bay is the closest city, 153 miles away. The nearest edge is a long way off, so local rules apply throughout.

• Where to Fish on O'Brien Lake

  No chart reached our records; the first cast is your sounding. This is a lake, so the margins and the first drop matter most. Look for the band where the shallows give up and the bottom falls away. County-wide records name walleye, northern pike, yellow perch and muskellunge. County records show what lives in the area; the local agency holds the water-by-water list. Read O'Brien Lake for ten minutes before the first cast goes out.

• Seasonal Patterns

  On the long-term average, July reads 65°F and January reads 10°F. Winter shuts the surface down for months. The open season starts with the thaw, near enough mid April. Going by climate averages, expect open water from about mid April until roughly late November. Early summer and early autumn carry the open-water season. That shapes the year on O'Brien Lake.

• Tackle & Baits

  Whether the bank is open is not something our records settle. Records list it as a natural water body rather than an impoundment. No launch point is recorded nearby, so this is a bank water unless you carry a boat in. A small crankbait along the drop and a worm in the thick stuff cover the bass. A phone call first saves an afternoon. Some water is controlled locally without a sign saying so. For a change of water, Shirley Lake is 2.1 miles distant. For O'Brien Lake, the notice at the access point is the final word.