Mullen Lake Fishing Guide, Cass County, Michigan

• Overview

  Look for Mullen Lake in the Cass County part of Michigan. What surrounds it is pine and birch. It runs to roughly 131 acres — big enough to hold fish away from the bank, small enough to learn. The edge runs 2.1 miles or so, easy to work in an afternoon. The closest town, Cassopolis, is 3.7 miles away. It is 16 miles to South Bend, the nearest city. No border sits close enough to matter.

• Where to Fish on Mullen Lake

  Depth is not on record here, so the bank has to tell you. Look for the band where the shallows give up and the bottom falls away. Weed, then depth: that is the order to fish a water of this kind. Survey and observation records for Cass County include bluegill, largemouth bass, yellow perch, warmouth and pink salmon. The county list is broader than any single water. Read Mullen Lake before you fish it and the day goes better.

• Seasonal Patterns

  Typical July readings run about 72°F; by January the average is down near 23°F. Winter shuts things down for a spell, then spring reopens them fast. Count on hard cover from midwinter, and open water from late March. Expect the water usable from around late March until roughly late December. The strongest runs come at either end of the open season. That shapes the year on Mullen Lake.

• Tackle & Baits

  We hold no note on access for this one. Records list it as a natural water body rather than an impoundment. Public data shows nothing built here, so treat the whole approach as informal. For the bass here, soft plastics worked slow along cover and a spinnerbait for searching do most of the work. Read any posted signs at the access point rather than assuming. Night access is frequently treated as a separate matter. Goose Lake at 1.1 miles is the sensible second choice. None of that is settled for Mullen Lake in what we hold.