FreeFishFishing in Minnesota: lake depth maps and where to start
Minnesota has more surveyed lake depth maps than almost any state. How to use them, notable waters, and where to find the official rules.
Minnesota is known as the Land of 10,000 Lakes, and it actually has more than that. For anglers, the bigger story is the data. The Minnesota Department of Natural Resources has surveyed and mapped the depth of thousands of lakes, which makes it one of the best states anywhere to learn how to read structure and find fish.
What you can fish for
Walleye is the state fish and the most popular target, but Minnesota also has excellent fishing for northern pike, muskellunge, largemouth and smallmouth bass, crappie, bluegill and yellow perch. Lake trout live in deep, cold lakes in the northeast, and trout streams run through the southeast's bluff country and along the North Shore of Lake Superior.
Waters to know
- Mille Lacs Lake: a huge, shallow central Minnesota lake famous for walleye and smallmouth bass, with rock reefs and mud flats that show up clearly on a depth map. Regulations here are specific to the lake and change often.
- Lake of the Woods: on the Canadian border, known for walleye and sauger and for very popular ice fishing.
- Leech Lake and the Brainerd lakes area: large, varied lakes with walleye, pike, muskie and bass.
- Lake Minnetonka: a large, many-bayed lake near the Twin Cities with good bass and panfish fishing.
Using Minnesota depth maps
Because so many lakes are surveyed, you can usually find a contour map for a lake before you go. Start with the basics from our depth map guide: points, inside turns, humps and the first breakline off shallow flats. In spring and fall, walleye often use the edges of shallow rock and gravel; in summer, many move to deeper humps and mud flats. Ice anglers rely heavily on these maps in winter, because structure is impossible to see under snow.
Keep in mind that some surveys are decades old. Shorelines and weed beds change, so treat the map as a starting point and confirm depth with electronics.
Through the seasons
Spring opens with the walleye opener in May, when fish are often shallow near spawning areas. Summer pushes walleye toward deeper structure and mud flats, while bass and panfish use weeds. Fall brings a strong walleye and muskie bite as water cools. Winter turns Minnesota into one of the busiest ice fishing states in the country, with walleye, perch, crappie and pike all popular through the ice.
Before you go
Minnesota has many lake-specific regulations, including special size limits on popular walleye and bass waters. It also has strict rules to prevent the spread of aquatic invasive species, such as zebra mussels and starry stonewort. Clean, drain and dispose of bait properly before leaving any access. If you are new to the state, read our licensing guide and check the official regulations linked below.
Official rules
Seasons, limits and license requirements change. The official source is the state agency: Minnesota fishing regulations and licenses.