Rock
A 79-acre lake near Markville in Pine County — best known for pike and walleye. Last surveyed 2012.
Fish Species (7)
Northern Pike
Typical numbers · large fish
Gill-net survey · surveyed Sep 2012
Last surveyed 2012 — treat with caution
Catch rate: 4.0 per gill net · typical 2.8–10 for a lake like this
Survey History
| Date | Catch Rate | Avg Length | Avg Weight |
|---|---|---|---|
| Sep 4, 2012 | 4.00 | 26.1" | 4.15 lbs |
| Sep 4, 2012 | 0.44 | 26.1" | 3.22 lbs |
| Sep 4, 2007 | 7.50 | 23.9" | 3.29 lbs |
Walleye
Typical numbers · large fish
Gill-net survey · surveyed Sep 2012
Last surveyed 2012 — treat with caution
Catch rate: 1.0 per gill net · typical 1–4 for a lake like this
Survey History
| Date | Catch Rate | Avg Length | Avg Weight |
|---|---|---|---|
| Sep 4, 2012 | 1.00 | 20.0" | 2.45 lbs |
| Sep 4, 2012 | 0.11 | 20.0" | 3.56 lbs |
| Sep 4, 2007 | 1.50 | 19.3" | 2.36 lbs |
Pumpkinseed
Above-normal numbers · small fish
Trap-net survey · surveyed Sep 1997
Last surveyed 1997 — treat with caution
Catch rate: 11.0 per trap net · typical 0.8–7.2 for a lake like this
Survey History
| Date | Catch Rate | Avg Length | Avg Weight |
|---|---|---|---|
| Sep 8, 1997 | 11.00 | 4.0" | 0.07 lbs |
| Sep 8, 1997 | 3.67 | 4.0" | - |
Bluegill
Typical numbers · small fish
Trap-net survey · surveyed Sep 2012
Last surveyed 2012 — treat with caution
Catch rate: 11.6 per trap net · typical 3.1–24.9 for a lake like this
Survey History
| Date | Catch Rate | Avg Length | Avg Weight |
|---|---|---|---|
| Sep 4, 2012 | 2.33 | 5.5" | 0.16 lbs |
| Sep 4, 2012 | 11.56 | 5.5" | 0.16 lbs |
| Sep 4, 2012 | 9.40 | 5.5" | - |
Yellow Perch
Below-normal numbers · small fish
Gill-net survey · surveyed Sep 2012
Last surveyed 2012 — treat with caution
Catch rate: 0.67 per gill net · typical 2.5–23.3 for a lake like this
Survey History
| Date | Catch Rate | Avg Length | Avg Weight |
|---|---|---|---|
| Sep 4, 2012 | 0.67 | 5.5" | 0.06 lbs |
| Sep 4, 2012 | 1.00 | 5.5" | 0.07 lbs |
| Sep 4, 2012 | 1.00 | 5.5" | - |
Other species in this lake (2)
Rough fish, bullheads, and baitfish recorded in DNR surveys — present in the lake, but not typical angling targets.
White Sucker
Below-normal numbers · large fish
Gill-net survey · surveyed Sep 2012
Last surveyed 2012 — treat with caution
Catch rate: 0.33 per gill net · typical 1–5.8 for a lake like this
Survey History
| Date | Catch Rate | Avg Length | Avg Weight |
|---|---|---|---|
| Sep 4, 2012 | 0.33 | 19.0" | 2.60 lbs |
| Sep 4, 2007 | 1.00 | 19.0" | 3.53 lbs |
| Sep 15, 1992 | 0.67 | - | 1.90 lbs |
Golden Shiner
Below-normal numbers · small fish
Gill-net survey · surveyed Sep 2012
Last surveyed 2012 — treat with caution
Catch rate: 0.33 per gill net · typical 0.5–5.1 for a lake like this
Survey History
| Date | Catch Rate | Avg Length | Avg Weight |
|---|---|---|---|
| Sep 4, 2012 | 0.67 | 5.1" | 0.05 lbs |
| Sep 4, 2012 | 10.50 | 5.1" | - |
| Sep 4, 2012 | 3.00 | 5.1" | - |
Biologist Notes
September 7, 2021A targeted survey was conducted on September 7 and 8, 2021 on Rock Lake (DOW 58-0007-00) for the purposes of determining if a fish kill had occurred d…
A targeted survey was conducted on September 7 and 8, 2021 on Rock Lake (DOW 58-0007-00) for the purposes of determining if a fish kill had occurred during the winter of 2020/2021. A concerned angler reported not being able to catch any fish and thought it may have killed over the winter. Six trap nets (three standard lake survey nets and three walleye pond nets) were placed randomly around the lake. A total of 102 walleye were caught in the nets. Thirty-eight walleye greater than young-of-the-year size, and 63 young-of-the-year. One golden shiner (5.9 inches) was also caught. One of the walleye pond sized nets did have a hole which affected the catch. Size range was from fingerling (5 to 6 inches) to 20.1 inches. No weights were taken. Based on the catch, the walleye population in Rock Lake appears to be in fine shape at the present time.
September 7, 2021A targeted survey was conducted on September 7 and 8, 2021 on Rock Lake (DOW 58-0007-00) for the purposes of determining if a fish kill had occurred d…
A targeted survey was conducted on September 7 and 8, 2021 on Rock Lake (DOW 58-0007-00) for the purposes of determining if a fish kill had occurred during the winter of 2020/2021. A concerned angler reported not being able to catch any fish and thought it may have killed over the winter. Six trap nets (three standard lake survey nets and three walleye pond nets) were placed randomly around the lake. A total of 102 walleye were caught in the nets. Thirty-eight walleye greater than young-of-the-year size, and 63 young-of-the-year. One golden shiner (5.9 inches) was also caught. One of the walleye pond sized nets did have a hole which affected the catch. Size range was from fingerling (5 to 6 inches) to 20.1 inches. No weights were taken. Based on the catch, the walleye population in Rock Lake appears to be in fine shape at the present time.
September 7, 2021A targeted survey was conducted on September 7 and 8, 2021 on Rock Lake (DOW 58-0007-00) for the purposes of determining if a fish kill had occurred d…
A targeted survey was conducted on September 7 and 8, 2021 on Rock Lake (DOW 58-0007-00) for the purposes of determining if a fish kill had occurred during the winter of 2020/2021. A concerned angler reported not being able to catch any fish and thought it may have killed over the winter. Six trap nets (three standard lake survey nets and three walleye pond nets) were placed randomly around the lake. A total of 102 walleye were caught in the nets. Thirty-eight walleye greater than young-of-the-year size, and 63 young-of-the-year. One golden shiner (5.9 inches) was also caught. One of the walleye pond sized nets did have a hole which affected the catch. Size range was from fingerling (5 to 6 inches) to 20.1 inches. No weights were taken. Based on the catch, the walleye population in Rock Lake appears to be in fine shape at the present time.
Frequently Asked Questions
What fish can you catch in Rock?
Based on Minnesota DNR survey data, anglers target Northern Pike, Walleye, Pumpkinseed, Bluegill, and Yellow Perch in Rock. See the full species list above for catch rates, size structure, and quality scores.
Is there public access at Rock?
Minnesota DNR records list public access for Rock. Check the DNR LakeFinder page for the launch type and directions before you go.
How deep is Rock?
Rock has a maximum depth of 11 feet, per Minnesota DNR data.
When were the main sport fish in Rock last surveyed?
The most recent Minnesota DNR survey data for the main sport fish in Rock is from 2012. Surveys this old should be treated with some caution — fish populations change over time.
Does Rock have any invasive species?
No invasive species are on record for Rock in Minnesota DNR data. Always clean, drain, and dry your equipment to help keep it that way.
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Lake Details
- Surface Area
- 79.32 acres
- Max Depth
- 11 ft
- Shoreline
- 1.43 mi
- Public Access
- Yes