Johnson Lake in Portage County: How and When to Fish It

• Overview

  Johnson Lake sits within Portage County in Wisconsin. It sits in mixed forest. At roughly 8 acres, the whole thing is within casting reach of a single walk. On size it sits at the modest end of our Portage County list. Amherst sits 5 miles from the bank. Iola follows at 5.8 miles, then King at 14 miles. The line between counties passes nearby, which can change who manages the water.

• Where to Fish on Johnson Lake

  There is no recorded depth, so work from what you can see. The shallow end warms first and pulls fish in ahead of the rest. The productive water is a rod length or two out, not a hundred. Reported across Portage County: brown trout, rainbow trout, common carp, bluegill and northern pike. Species recorded across the county may be limited to a few waters. On Johnson Lake the first feature you find is usually worth a session.

• Seasonal Patterns

  Long-term averages put July at about 69°F and January near 13°F. The season turns properly here, and fish follow it closely. Ice-out usually falls in early April, and the weeks after it fish hardest. Open water usually runs from early April until about early December. The open run goes from the thaw to the freeze, and April through October covers most of it. Johnson Lake runs to that rhythm year in and year out.

• Tackle & Baits

  Nothing we hold confirms whether access is permitted. 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. Some banks are open only from a marked point. Check whether bait restrictions apply before you buy any. Should this one be busy, Rinehart Lake is 1 mile off. The position on Johnson Lake is worth confirming on the day.