Bertha Lake totals 334 acres and is part of the Whitefish Chain of Lakes. There is no public access on Bertha Lake, but you can get here from a channel on Clamshell Lake or Whitefish Lake. It has a maximum depth of 64 feet with 43% of the lake being 15 feet deep or less. The lakeshore is heavily developed with around 150 homes. There are catchable numbers of walleye in this lake with some nice quality sized fish as well. Good numbers of northern pike are in Bertha Lake and while most pike run on the small side, there are some quality pike in here too. Largemouth bass are also available in good numbers. Other fish include smallmouth bass, bluegill, crappie, rock bass and perch.
MN DNR Lake Information Report