Rock Lake
About Rock Lake
Rock Lake is a 341-acre lake near McGregor in Aitkin County, Minnesota. It reaches 13 feet at its deepest point, and has roughly 5.3 miles of shoreline. DNR surveys put average water clarity at about 4.3 feet.
Minnesota DNR fisheries surveys list 11 fish species here, including walleye, northern pike, black crappie, bluegill, pumpkinseed, and yellow perch. The most recent fisheries survey on file dates to 2025.
There is one public boat launch (concrete surface) managed by the Minnesota DNR. Ice typically goes out around April 7, based on 5 years of DNR ice-out records.
Plan Your Visit to Rock Lake
- 341 acres, up to 13 feet deep, near McGregor
- 1 public boat launch (concrete) — managed by the Minnesota DNR
- Game fish on the DNR survey: walleye, northern pike, black crappie, bluegill, pumpkinseed, and yellow perch
- Average water clarity around 4.3 feet
Access & Fees
- Public access
- 1 public boat launch (concrete)
- Launch fee
- Free at DNR accesses
- Managed by
- Minnesota DNR
Conditions
- Surface area
- 341 acres
- Max depth
- 13 ft
- Shoreline
- 5.3 mi
- Water clarity
- 4.3 ft
- Shallows (under 15 ft)
- 341 acres
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
Facilities
- 1 public boat launch (concrete)
Best For
- Ice fishing
- Ice is never completely safe — check thickness yourself before walking or driving on any lake
Angler's Report
Minnesota DNR LakeFinder- Species on survey
- 11
- Game fish
- 6
- Stocked
- No
- Last DNR survey
- 2025
- Special regulations
- No
- Fishing pier
- No
- Ice fishing
- Yes
- Boat launch
- Yes
Fishing data: Minnesota Department of Natural Resources. Regulations change — confirm with the current DNR fishing regulations.
Ice-Out History
- Median ice-out
- April 7
- Years of record
- 5
- Earliest
- March 29, 2016
- Latest
- May 8, 2013
- Most recent
- April 1, 2017
See every lake on the ice-out tracker. Ice-out data: Minnesota DNR State Climatology Office.
Activities
Amenities
Fish Species
Plan your trip to Rock Lake
Compare Rock Lake against the top-ranked lakes nearby, then map your route.
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See how Rock Lake ranks among ice fishing lakes nearby.
Nearby Lakes
Round Lake
57 out of 100 Lake ScoreAitkin · McGregor185 acres
1.4 miles away
Turner Lake
38 out of 100 Lake ScoreAitkin · McGregor63 acres
1.5 miles away
Portage Lake
44 out of 100 Lake ScoreAitkin · Kimberly372 acres
3.3 miles away
Jenkins Lake
46 out of 100 Lake ScoreAitkin · Palisade114 acres
4.6 miles away
Fleming Lake
48 out of 100 Lake ScoreAitkin · Palisade319 acres
5.3 miles away
Wilkins Lake
62 out of 100 Lake ScoreAitkin · Palisade349 acres
5.3 miles away
Frequently Asked Questions
Where is Rock Lake?
Rock Lake is in Aitkin County, Minnesota, near McGregor. It covers 341 acres and reaches 13 feet deep.
How big and how deep is Rock Lake?
Rock Lake covers 341 acres with about 5.3 miles of shoreline. Its maximum depth is 13 feet.
What fish can you catch at Rock Lake?
Minnesota DNR surveys list Walleye, Northern Pike, Black Crappie, Bluegill, Pumpkinseed, and Yellow Perch and other species. A Minnesota fishing license is required for anyone 16 and older.
Is there a public boat launch on Rock Lake?
Yes. Rock Lake has 1 public boat launch (concrete), managed by the Minnesota DNR. DNR public water accesses are free to use.
Can you swim at Rock Lake?
There is no mapped public swim beach at Rock 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.
Is Rock Lake stocked?
The DNR has no stocking report on file for Rock Lake; its fishery is sustained by natural reproduction or has not been stocked recently.
When does the ice go out on Rock Lake?
The median ice-out date is April 7, from 5 years of Minnesota DNR records. The earliest on record is March 29, 2016 and the latest is May 8, 2013.