Size
13,356ac
Boat Launch
Carry-in Launch
Toilet
No
Boat Dock
Species in Grand Lake St. Marys
Crappie
Perch
Channel catfish
Largemouth bass
Bluegill
Overview
Grand Lake St. Marys Map
Fishing Regulations
Special Fishing Regulations: This lake has special fishing regulations that differ from statewide or border water regulations for those species identified below and take precedence. Regulations listed below are currently in place. Visit the fishing regulations page for links to upcoming regulations for specific lakes.
Special Waterbody Regulations
- Trotlines may be used in the area of Grand Lake St. Marys bounded on the west by Prairie Creek, on the east by Big Chicksaw Creek, and on the north by a line of buoys exdtending east to west between Big Chicksaw and Prairie Creeks
- Trotlines may not be set in channels or across the mouths of channels or streams in Grand Lake St. Marys
Special Species Regulations
- Black Crappie: In Grand Lake St. Marys, for Black Crappie over 9 inches, daily limit = 30
- White Crappie: In Grand Lake St. Marys, for White Crappie over 9 inches, daily limit = 30
Weather
64°Feels like 64°
75°
56°
75°56°6:57 AM
8:22 PM
4 mph
Northwest
0 in
Rain
29.98 inHg
Rising
MondayMo
75° / 56°
TuesdayTu
77° / 61°
WednesdayWe
81° / 67°
ThursdayTh
81° / 65°
FridayFr
80° / 63°
SaturdaySa
78° / 66°
Moon Phase
August 24, 2026
87% Illumination
waxing gibbous, getting brighter
MondayMo08/24
TuesdayTu08/25
WednesdayWe08/26
ThursdayTh08/27
FridayFr08/28
SaturdaySa08/29
SundaySu08/30
Get Your Line in the Right Water
Quickly find the best places to fish and plan your day right.
Top Fish Species
Crappie
5-12 in
Length Range
8 in
Length Range
2025
Surveyed
Abundance (CPUE)
Understanding Abundance
Abundance ratings are based on Catch Per Unit Effort (CPUE) measurements conducted by the MN DNR, and represent a snapshot of a species population at a given point in time
Source: Minnesota Department of Natural Resources. Survey cadence may vary by state and water body.Species Lengths
