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Grassy Lake

Northeast St. Louis, Minnesota — St. Louis County.

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245Surface acres
1Public access sites

Surface area: The USGS National Hydrography Dataset outline (NHD Permanent ID 120019176).

Location & fast facts

Where Grassy Lake is in Minnesota

The red circle marks Grassy Lake.

Fast facts

About Grassy Lake

  • County: St. Louis
  • Town: Northeast St. Louis
  • Mapped as: Lake or pond (USGS National Hydrography Dataset)
  • Distance: about 219 mi from Minneapolis and 85 mi from Duluth, straight-line (not driving distance)

Towns and counties: U.S. Census Bureau boundaries overlaid on the USGS lake outline.

Fishing in Minnesota

Official Minnesota DNR pages. Rules and fees change; check before you go.

Good for & watch for

Good for

  • Paddling. 1 public access site, no trailer ramp listed
  • Fishing. Northern pike, Largemouth bass, Smallmouth bass and Black crappie
  • Camping. 4 campgrounds within 15 mi (list)

Watch for

  • Cold water. Water stays cold well into late spring and turns cold again in fall. Wear a life jacket when paddling in the shoulder seasons.

Built only from the data on this page: official access lists, OpenStreetMap beaches and trails, campground listings, state and USGS invasive-species records. We don't rate crowds or water quality.

Official lake survey (Minnesota DNR)

15 ftMaximum depth
257Acres (state figure)

Fish species found in Minnesota DNR lake surveys: Black crappie, Bluegill, Largemouth bass, Northern pike, Smallmouth bass, Yellow perch.

Average depth not published.

Shallow (littoral) area: 257 of 257 acres

Source: Minnesota Department of Natural Resources LakeFinder record for Grassy Lake (DOW 69008200), with lake survey reports, depth maps and stocking history. Acreage here can differ slightly from our mapped outline.

Lake map

Grassy Lake shoreline, boat launches & beaches

Grassy Lake Public Water Access Site (Cartop / walk-in)1½ mileN

Numbers on the map match the list at rightbelow.

Cartop / walk-in
  1. 1Grassy Lake Public Water Access Site
    Cartop / walk-in · Northeast St. Louis

Shoreline: USGS National Hydrography Dataset (NHD Waterbody, Permanent ID 120019176), public domain. State outline: U.S. Census Bureau TIGERweb. Points: Minnesota DNR public water access sites (Minnesota Geospatial Commons). Interactive map: Leaflet with © OpenStreetMap contributors. Not for navigation.

Campgrounds near Grassy Lake

We found 4 campgrounds and RV parks within 15 miles of Grassy Lake, 1 of them within 5 miles. Distances are straight-line from the nearest point on the shoreline, so driving distance is longer.

All campgrounds & RV parks in Minnesota

Green tent icons on the lake map mark campgrounds near the shore, and the interactive map shows the closest 12. Amenities are listed only where a source records them; call or check the campground's website before you go, since seasons and rates change every year.

Campground data: Recreation.gov (RIDB) · OpenStreetMap contributors (ODbL). Pulled Oct 12, 2026.

Conditions right now

Air temperature & conditions (nearest NWS station)Loading…
Fetching the latest National Weather Service observation…

Live from the National Weather Service API for the lake's coordinates (48.0002, -91.8599). The nearest station may be several miles away. NWS forecast for Grassy Lake. No live water-temperature sensor is shown because we haven't found a public one for this lake.

Sun, moon & best fishing times

Sun & moon at Grassy Lake

Best fishing times

Major periodMinor periodDaylight

    Based on solunar theory, an estimate. Major periods (about 2 hours) center on when the moon is directly overhead or underfoot; minor periods (about 1 hour) center on moonrise and moonset. The 0–100 activity score rises during those periods and gets a boost near sunrise and sunset and around the new and full moon. Weather, water temperature and pressure often matter more. Sun and moon times are calculated in your browser from the lake's coordinates with standard astronomy formulas, shown in CT (America/Chicago), and accurate to within a few minutes.

    Boat launches & access sites

    1 public access site listed.

    SiteTownOwnerTypeParkingFeeUsesMap
    Grassy Lake Public Water Access SiteNortheast St. LouisU.S. Forest ServiceCarry-in (hand launch)4 car—Fishing, Boating48.0068, -91.8729

    Minnesota DNR public water access sites (Minnesota Geospatial Commons)

    Fees, hours and rules change; confirm with the site owner before you go.

    Contact & official info

    Questions about Grassy Lake

    How big is Grassy Lake?

    Grassy Lake covers about 245 acres in Northeast St. Louis, Minnesota (St. Louis County).

    How deep is Grassy Lake?

    The maximum recorded depth is 15 feet, according to the Minnesota DNR LakeFinder.

    What fish are in Grassy Lake?

    Minnesota DNR LakeFinder lists Northern pike, Largemouth bass, Smallmouth bass, Black crappie, Bluegill and Yellow perch.

    Is there a public boat launch on Grassy Lake?

    No trailer ramp is listed, but there is 1 public access site for car-top boats or shore access.

    Are there campgrounds near Grassy Lake?

    Yes. We list 4 campgrounds and RV parks within 15 miles, 1 of them within 5 miles.

    What towns are on Grassy Lake?

    Grassy Lake touches Northeast St. Louis in St. Louis County, Minnesota.

    Share a tip or fishing report

    Know Grassy Lake? Tell us about the launch, parking, where they're biting or anything a first-time visitor should know. Tips go privately to the LakeRipple editor; nothing is posted automatically. Helpful tips may be featured on this page (we'll use your first name only if you give one).

    Lakes & ponds nearby

    Straight-line distance between lake centers. All Minnesota lakes & ponds · All waters in Northeast St. Louis