Granite Lake
About Granite Lake
Granite Lake is a 306-acre lake near Prairie Portage in Cook County, Minnesota. It reaches 45 feet at its deepest point, and has roughly 11.5 miles of shoreline. DNR surveys put average water clarity at about 8 feet. The lake is a border water shared with Canada, so different seasons, limits and licensing rules can apply on the far side.
The DNR has no fish survey on file for this lake, so treat any fishing as exploratory.
The DNR lists public water access for the lake; confirm the launch type before towing a trailer in.
Plan Your Visit to Granite Lake
- 306 acres, up to 45 feet deep, near Prairie Portage
- Public access on record — bring a boat you can hand-launch unless you confirm a ramp
- Average water clarity around 8 feet
- Border water with Canada — know which side of the line you are fishing on
Access & Fees
- Public access
- Public access on record
- Launch fee
- Free at DNR accesses
Conditions
- Surface area
- 306 acres
- Max depth
- 45 ft
- Shoreline
- 11.5 mi
- Water clarity
- 8 ft
Rules & Regulations
- A Minnesota fishing license is required for anglers 16 and older
- Drain plugs must be out and all water drained before leaving any access; remove aquatic plants from boats and trailers
- Children under 10 must wear a life jacket on a boat that is underway
- Border-water seasons and limits with Canada differ from Minnesota inland rules
Facilities
No developed facilities on record. Plan to be self-sufficient.
- Ice is never completely safe — check thickness yourself before walking or driving on any lake
Activities
Amenities
Fish Species
Plan your trip to Granite Lake
Compare Granite Lake against the top-ranked lakes nearby, then map your route.
Nearby Lakes
Clove Lake
42 out of 100 Lake ScoreCook · Prairie Portage160 acres
1.7 miles away
Gneiss Lake
39 out of 100 Lake ScoreCook · Grand Marais227 acres
2.3 miles away
Larch Lake
46 out of 100 Lake ScoreCook · Grand Marais132 acres
2.7 miles away
Magnetic Lake
60 out of 100 Lake ScoreCook · Maple Hill447 acres
3.2 miles away
Marabaeuf Lake
49 out of 100 Lake ScoreCook · Grand Marais860 acres
4.1 miles away
Gunflint Lake
86 out of 100 Lake ScoreCook · Grand Marais4,009 acres
5.1 miles away
Frequently Asked Questions
Where is Granite Lake?
Granite Lake is in Cook County, Minnesota, near Prairie Portage. It covers 306 acres and reaches 45 feet deep.
How big and how deep is Granite Lake?
Granite Lake covers 306 acres with about 11.5 miles of shoreline. Its maximum depth is 45 feet.
What fish can you catch at Granite Lake?
The DNR has no fish survey on file for Granite Lake.
Is there a public boat launch on Granite Lake?
Public access is on record, but not a trailer ramp: public access on record.
Can you swim at Granite Lake?
There is no mapped public swim beach at Granite Lake. Minnesota's public waters are open to swimming where you have legal access, but there are no lifeguards or water-quality monitoring away from designated beaches.