Clam Lake (Martin County)
Martin County, Minnesota - DNR stocking history, depth and survey data
Minnesota · Minnesota Department of Natural Resources (DNR) · DOW 46011100
DNR records show 4 stocking entries at Clam Lake (Martin County) since 2018, most recently black crappie adults in 2024 (120 fish).
- Clam Lake (Martin County) has 4 DNR stocking records across 3 years (2018-2024): northern pike (2), black crappie (1), yellow perch (1).
- The most-stocked species by count is yellow perch: 830 fish on record.
- Maximum depth 8 ft; surface area 71 acres, 71 littoral acres, 1.5 miles of shoreline, per the DNR lake survey.
- Average water clarity (Secchi depth) 1.2 ft.
- Fish species DNR lists here: bigmouth buffalo, black bullhead, black crappie, common carp, freshwater drum, northern pike, white sucker, yellow bullhead, yellow perch.
- 1 public access on the DNR list.
- Most recent DNR fish survey: (standard survey).
- Martin County, nearest town Trimont; DNR lake number (DOW) 46011100.
Depth map
Bathymetric contours from the Minnesota DNR lake survey (get source); depths in feet. Simplified for the web; not for navigation.
Stocking history
| Year | Species | Size | Number | Pounds |
|---|---|---|---|---|
| 2024 | Black Crappie | adults | 120 | 40.0 |
| 2024 | Yellow Perch | adults | 830 | 79.0 |
| 2021 | Northern Pike | fingerlings | 284 | 200.0 |
| 2018 | Northern Pike | adults | 85 | 149.1 |
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 | county | - ACCESS FROM COUNTY RDS. 38 AND 21. |
DNR fish survey, 2023
| Species | Gear | Catch per net | Total catch | Avg lb |
|---|---|---|---|---|
| Black bullhead | Standard trap nets | 390.00 | 3,120 | 0.00 |
| Northern pike | Standard trap nets | 2.38 | 19 | 1.82 |
| Common carp | Standard trap nets | 0.62 | 5 | 1.47 |
| Bigmouth buffalo | Standard trap nets | 0.62 | 5 | 5.59 |
| Yellow bullhead | Standard trap nets | 0.38 | 3 | 0.58 |
| Black bullhead | Standard gill nets | 87.00 | 87 | 0.05 |
| Common carp | Standard gill nets | 3.00 | 3 | 1.29 |
| Northern pike | Standard gill nets | 2.00 | 2 | 1.65 |
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.
Clam Lake is a 74 acre lake located near Trimont, Minnesota in Martin County. The lake has a shoreline length of 1.49 miles and a maximum depth of 8.0 feet. Curly leaf pondweed can be abundant from June to July. Curly Leaf Pondweed was first documented on Clam Lake during a 1991 survey. Clam Lake is managed primarily for Yellow Perch, and secondarily for Northern Pike and Black Crappie. Clam Lake has a history of low dissolved oxygen in winter months and can have minor winterkill events as a result. The last winterkill event was during the winter of 2020 -2021, however it was not detected until this survey. A fish survey was conducted the week of August 21, 2023 with 1 gill net and 8 trap nets to monitor the fish community in Clam Lake. There were no Yellow Perch captured in the 2023 standard survey, suggesting that they were either eliminated or severely reduced in abundance from Clam Lake during the 2020-2021 winterkill. The previous survey done in 2017 had a Yellow Perch catch rate of 94.0 per gill net. Pre-spawn Yellow Perch will be stocked in the spring of 2024 to restart the Perch population in Clam Lake. Those fish will likely spawn in the lake and will take a few years of growth to see a substantial Yellow Perch fishery. Like Yellow Perch, Black Crappie appear to have been eliminated or significantly reduced in abundance by a winterkill during the winter of 2020-2021. No Black Crappie were captured in the 2023 standard survey, while in 2017, Black Crappie were sampled at a rate of 10.1 per trap net. Pre-spawn Black Crappie will be stocked in the spring of 2024 to restart the Crappie population in Clam Lake. The 2023 Northern Pike catch rate was 2.4 per trap net, higher than the long-term average of 0.7 per trap net. These Pike were likely from the fingerlings that were stocked in the fall of 2021. Northern Pike lengths ranged from 18.2 to 24.5 inches and averaged 20.5 inches. Northern Pike are able to tolerate low dissolved oxygen levels better than other species such as Crappie and Perch. Clam Lake is within the "southern zone" of the Northern Pike zone regulations, so two Pike longer than 24 inches can be harvested. The best indicator that Clam Lake likely experienced a winterkill was the high abundance of small Black Bullhead. In 2023, Black Bullhead were captured at a rate of 390 per trap net, greatly exceeding the expected range of catch rates for similar lakes (11.5 to 132.6 per trap net). Black Bullhead lengths were small, ranging from 4.9 to 6.0 inches and averaging 5.5 inches. The small range of sizes indicates one year class of Black…
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; contours are the DNR bathymetric survey. Regulations, slot limits and special rules are on the DNR page linked above, not here.
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