Cobblestone Lake
Dakota County, Minnesota - DNR stocking history, depth and survey data
Minnesota · Minnesota Department of Natural Resources (DNR) · DOW 19045600
DNR records show 19 stocking entries at Cobblestone Lake since 2017, most recently walleye yearlings in 2025 (125 fish).
- Cobblestone Lake has 19 DNR stocking records across 9 years (2017-2025): walleye (17), yellow perch (2).
- The most-stocked species by count is walleye: 404,115 fish on record.
- Maximum depth 18 ft; surface area 35 acres, 1.3 miles of shoreline, per the DNR lake survey.
- Average water clarity (Secchi depth) 6.3 ft.
- Fish species DNR lists here: black bullhead, black crappie, bluegill, green sunfish, hybrid sunfish, largemouth bass, pumpkinseed, walleye, white sucker, yellow perch.
- 1 public access on the DNR list.
- Most recent DNR fish survey: (standard survey).
- Dakota County, nearest town Rosemount; DNR lake number (DOW) 19045600.
Stocking history
| Year | Species | Size | Number | Pounds |
|---|---|---|---|---|
| 2025 | Walleye | yearlings | 125 | 92.0 |
| 2025 | Walleye | adults | 96 | 116.0 |
| 2025 | Yellow Perch | adults | 1,470 | 98.0 |
| 2024 | Walleye | yearlings | 218 | 147.0 |
| 2023 | Walleye | fingerlings | 800 | 80.0 |
| 2023 | Walleye | adults | 61 | 61.0 |
| 2022 | Walleye | adults | 13 | 12.0 |
| 2022 | Walleye | yearlings | 291 | 119.0 |
| 2021 | Walleye | adults | 344 | 229.3 |
| 2020 | Walleye | adults | 150 | 200.0 |
| 2019 | Walleye | fingerlings | 1,500 | 75.0 |
| 2019 | Walleye | yearlings | 29 | 12.5 |
| 2018 | Walleye | fry | 400,000 | 3.9 |
| 2018 | Walleye | adults | 49 | 66.5 |
| 2018 | Walleye | yearlings | 261 | 76.0 |
| 2018 | Yellow Perch | adults | 436 | 109.0 |
| 2017 | Walleye | fingerlings | 17 | 8.5 |
| 2017 | Walleye | yearlings | 71 | 31.0 |
| 2017 | Walleye | adults | 90 | 90.0 |
Field note · Minnesota stocks by year, not by truck day: walleye fry go in within weeks of ice-out, fingerlings and yearlings mostly in fall, and stream trout in spring and fall. A row here means the fish went in during that year; DNR adds the year's rows after the fact, so the current year can look empty until winter.
Public accesses
| Type | Owner | Where |
|---|---|---|
| CA | city | - No formal access for carry-in but most of shore is accessible for carry-in. |
DNR fish survey, 2025
| Species | Gear | Catch per net | Total catch | Avg lb |
|---|---|---|---|---|
| Yellow perch | Standard gill nets | 60.00 | 60 | 0.27 |
| Bluegill | Standard gill nets | 16.00 | 16 | 0.23 |
| Walleye | Standard gill nets | 8.00 | 8 | 0.69 |
| Black bullhead | Standard gill nets | 5.00 | 5 | 0.66 |
| Black crappie | Standard gill nets | 3.00 | 3 | 0.19 |
| Pumpkinseed | Standard gill nets | 3.00 | 3 | 0.30 |
| Bluegill | Standard trap nets | 18.80 | 94 | 0.21 |
| Pumpkinseed | Standard trap nets | 2.60 | 13 | 0.16 |
| Walleye | Standard trap nets | 1.20 | 6 | 0.79 |
| Hybrid sunfish | Standard trap nets | 1.00 | 5 | 0.29 |
| Yellow perch | Standard trap nets | 0.60 | 3 | 0.31 |
| Black crappie | Standard trap nets | 0.40 | 2 | 0.22 |
| Green sunfish | Standard trap nets | 0.20 | 1 | 0.08 |
Catch per net (CPUE) is the DNR survey's count per gill net or trap net set; higher means more of that species were sampled, not a fishing forecast. Top species per gear shown; where we have no verified common name for a DNR code, the code itself is shown.
A former gravel pit, Cobblestone Lake is a 37-acre, class 36 'Fishing in the Neighborhood' (FiN) lake located in the City of Apple Valley. The city owns the entire shoreline and operates Cobblestone Lake Park. The park provides a fishing pier, shorefishing access, playground, picnic tables, a walking path surrounding the entire lake, and canoe and kayak storage. The sport fish community consists of Walleye, Largemouth Bass, Bluegills, Yellow Perch, and Black Crappie. Water clarity has increased consistently from 1.25 feet in 2005 to 6.0 feet in 2025. A more balanced fish community has been established with the addition of Bluegill, Largemouth Bass, and Walleye. Walleye and Largemouth Bass are the primary predator species in Cobblestone Lake. Although Walleye numbers in 2025 (8.0/gill net) showed a slight decrease from 2020 (11.0/gill net), catches were still well above average compared to other similar lakes. Sampled Walleyes ranged from 9.9 to 16.6 inches with an average of 12.4. There were 6 Walleye caught in trap nets, averaging13.8 inches. Walleye have been stocked in Cobblestone every year since 2017. The panfish population shifted from one dominated by Hybrid Sunfish in 2005 to one dominated by Bluegill in 2025. Bluegill numbers (18.8/trap net) were up from the 2020 survey (6.0/trap net) and averaged6.3 inches (range of 3.4 to 8.8 inches). Black Crappie entered the lake in large numbers starting in 2010 but have since decreased dramatically with the increase in Bluegill numbers. Only 5 Black Crappie (3 in gill net, 2 in trap nets) were caught in the 2025 survey. No Black Crappie exceeded 7.5 inches. Hybrid Sunfish dominated the panfish population in 2005, but since then it has decreased in number every year, with only 5 sampled in 2025. Pumpkinseeds were sampled in well below average numbers for class 36 lakes. Yellow Perch emerged in Cobblestone for the first time in the 2020 survey and were found in their highest numbers ever in 2025 at 60/gill net. Yellow Perch lengths ranged from 7.3 to 11.3 inches, with an average of 8.3 inches. Yellow Perch were stocked in 2018 and 2025. Black Bullheads continue to be present in low abundance.
Minnesota DNR survey narrative, .
All Minnesota stockings · every Minnesota lake with a page · state CSV · this lake on DNR LakeFinder
Stocking rows, depths, accesses and survey figures are Minnesota DNR LakeFinder data as of 2026-09-02. Regulations, slot limits and special rules are on the DNR page linked above, not here.
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