Cobblestone

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.

A former gravel pit, Cobblestone Lake is a 37-acre, class 36 'Fishing in the Neighborhood' (FiN) lake located at Diamond Path Road and County Road 36. The City of Apple Valley owns the entire shoreline and operates Cobblestone Lake Park. The park provides a fishing pier, shorefishing access, playground, picnic tables, a walking path and canoe/kayak storage. The sport fish community consists of Black Crappie, Bluegill, Green, Pumpkinseed and Hybrid Sunfish, Largemouth Bass and Walleye and Yellow Perch. Stocking has consisted of Bluegills and Black Crappies in 2005 and 2006, Walleyes since 2005 and Yellow Perch in 2018. A more balanced fish community has been established with the addition of Black Crappies, Largemouth Bass, Yellow Perch and Walleye. Water clarity has averaged about 3 feet for the last ten years according the Minnesota Pollution Control Agency. Walleye and Largemouth Bass are the primary predator species in Cobblestone Lake. Walleye numbers (11.0/gill net) were above average when compared to other similar lakes in Minnesota. Sampled Walleyes ranged from 7.5 to 26.0 inches with an average length of 15.8 inches. Largemouth Bass averaged over 11.8 inches during this survey and the panfish population was dominated by Bluegill and Black Crappie in 2020. Bluegill numbers (6.0/trap net) were down from the 2015 survey (30.0/trap net) but are still about average for lakes like Cobblestone. Bluegill mean size was 6.0 inches with a range of 3.0 to 8.0 inches. Black Crappie catch rates in 2020 were 9.0/gill net and 1.6/trap net and about average for lakes similar to Cobblestone. Only three Black Crappie exceeded the 9.0 inch mark. Green Sunfish numbers were low and consistent with the previous assessments. Pumpkinseed Sunfish were sampled in below average numbers for lakes like Cobblestone. Yellow Perch, sampled for the first time in Cobblestone, were found in above average abundance, with some quality fish in the population. Black Bullheads continue to be found in low abundance.

A former gravel pit, Cobblestone Lake is a 37-acre, class 36 'Fishing in the Neighborhood' (FiN) lake located at Diamond Path Road and County Road 36. The City of Apple Valley owns the entire shoreline and operates Cobblestone Lake Park. The park provides a fishing pier, shorefishing access, playground, picnic tables, a walking path and canoe and kayak storage. The sport fish community consists of Black Crappie, Bluegill, Green, Pumpkinseed and Hybrid Sunfish, Largemouth Bass and Walleye. Bluegills and Black Crappies were stocked in 2005 and 2006 and Walleyes have been stocked in odd numbered years since 2005. Water clarity has increased from 1.25 feet in 2005 to 3.2 feet in 2014. A more balanced fish community has been established with the addition of Black Crappies, Largemouth Bass and Walleye. Walleye and Largemouth Bass are the primary predator species in Cobblestone Lake. Walleye numbers (2.0/gill net) were above average when compared to other similar lakes in Minnesota. Sampled Walleyes ranged from 12.64 to 25.0 inches with an average length of 16.9 inches. Although only six Largemouth Bass was sampled by the gear, we observed several other Largemouth Bass below ten inches in the shallows during survey. Largemouth Bass averaged over 11 inches during this survey. The panfish population shifted from one dominated by Hybrid Sunfish in 2005 to one dominated by Bluegill and Black Crappie in 2015. Bluegill numbers (30.6/trap net) were up from the 2010 survey (16.8/trap net). Of the 167 Bluegills sampled using trap nets, approximately 80% were above 6.0 inches with no fish exceeding 7.5 inches. Bluegill mean size was 6.3 inches with a range of 4.17 to 7.1 inches. Although no Black Crappies were sampled in the 2005 population assessment, 2010 gill net (13.0/net) and trap net (20.2/ net) catches exceeded the 1st quartiles for both gear types. Black Crappie (N= 159) catch rates in 2015 were 79.0/gill net and 16.0/ trap net, which is above average when compared to similar lakes in Minnesota. No Black Crappie exceeded 9.0 inches. Green Sunfish numbers were low and consistent with the 2005 and 2010 assessment. Conversely, 2015 Hybrid Sunfish numbers (4.4/trap net) are considerably down from the 2005 assessment (51.2/trap net). Pumpkinseed Sunfish were sampled in below average numbers for lakes like Cobblestone. Black Bullheads numbers (6.0/gill net and 5.6/trap net) are considerably down from the 2005 and 2010 population assessments (147.4/gill net; 60.0/trap net and 7.50/gill net; 19.60/trapnet respectively).

Based on Minnesota DNR survey data, anglers target Walleye, Yellow Perch, Largemouth Bass, Bluegill, and Green Sunfish in Cobblestone. See the full species list above for catch rates, size structure, and quality scores.

We don't have a confirmed public access point on record for Cobblestone. Check the DNR LakeFinder page for current access details before you go.

Cobblestone has a maximum depth of 18 feet, per Minnesota DNR data.

The most recent Minnesota DNR survey data for the main sport fish in Cobblestone is from 2025.

Yes — Cobblestone has confirmed Eurasian watermilfoil. Clean, drain, and dry your equipment to avoid spreading invasives to other waters.