Rock Lake
About Rock Lake
Rock Lake is an 183-acre lake near Maple Lake in Wright County, Minnesota. It reaches 37 feet at its deepest point, with an average depth of about 14 feet, and has roughly 3 miles of shoreline. DNR surveys put average water clarity at about 3.2 feet, so expect stained or algae-tinted water in summer.
Minnesota DNR fisheries surveys list 15 fish species here, including walleye, northern pike, largemouth bass, black crappie, white crappie, and bluegill. The DNR has stocking records for the lake, so check the stocking report for the most recent species and year classes. The most recent fisheries survey on file dates to 2025.
There is one public boat launch (concrete surface) managed by the Minnesota DNR. The lake is listed as infested with Eurasian watermilfoil — clean, drain and dry your boat and gear before leaving.
Plan Your Visit to Rock Lake
- 183 acres, up to 37 feet deep, near Maple Lake
- 1 public boat launch (concrete) — managed by the Minnesota DNR
- Game fish on the DNR survey: walleye, northern pike, largemouth bass, black crappie, white crappie, and bluegill
- Average water clarity around 3.2 feet — expect green or stained water by midsummer
- Listed as infested with Eurasian watermilfoil — clean, drain and dry before you leave
Access & Fees
- Public access
- 1 public boat launch (concrete)
- Launch fee
- Free at DNR accesses
- Managed by
- Minnesota DNR
Conditions
- Surface area
- 183 acres
- Max depth
- 37 ft
- Average depth
- 14 ft
- Shoreline
- 3 mi
- Water clarity
- 3.2 ft
- Shallows (under 15 ft)
- 99 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
- Walleye fishing
- Ice fishing
- Low-clarity lakes are prone to summer algae blooms; keep dogs out of green, scummy water
- Ice is never completely safe — check thickness yourself before walking or driving on any lake
Angler's Report
Minnesota DNR LakeFinder- Species on survey
- 15
- Game fish
- 8
- Stocked
- Yes
- 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.
Activities
Amenities
Fish Species
Plan your trip to Rock Lake
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Nearby Lakes
Henshaw Lake
34 out of 100 Lake ScoreWright · Albion Center272 acres
2.8 miles away
Ramsey Lake
56 out of 100 Lake ScoreWright · Maple Lake317 acres
2.9 miles away
Camp Lake
48 out of 100 Lake ScoreWright · Maple Lake123 acres
3.9 miles away
Granite Lake
50 out of 100 Lake ScoreWright · West Albion362 acres
4.8 miles away
Upper Maple Lake
66 out of 100 Lake ScoreWright · Maple Lake633 acres
4.9 miles away
Sullivan Lake
48 out of 100 Lake ScoreWright · Maple Lake71 acres
4.9 miles away
Frequently Asked Questions
Where is Rock Lake?
Rock Lake is in Wright County, Minnesota, near Maple Lake. It covers 183 acres and reaches 37 feet deep.
How big and how deep is Rock Lake?
Rock Lake covers 183 acres with about 3 miles of shoreline. Its maximum depth is 37 feet and its average depth is about 14 feet.
What fish can you catch at Rock Lake?
Minnesota DNR surveys list Walleye, Northern Pike, Largemouth Bass, Black Crappie, White 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?
Yes. The Minnesota DNR has stocking records for Rock Lake; species and numbers vary by year, so see the stocking report on DNR LakeFinder.
Does Rock Lake have invasive species?
Yes. The DNR lists Rock Lake as infested with Eurasian watermilfoil. State law requires you to clean off plants, pull the drain plug and drain all water before leaving the access.