Thompson Lake (Grant County)
Grant County, Minnesota - DNR stocking history, depth and survey data
Minnesota · Minnesota Department of Natural Resources (DNR) · DOW 26002000
DNR records show 5 stocking entries at Thompson Lake (Grant County) since 2017, most recently walleye fry in 2025 (37,000 fish).
- Thompson Lake (Grant County) has 5 DNR stocking records across 5 years (2017-2025): walleye (5).
- The most-stocked species by count is walleye: 333,000 fish on record.
- Maximum depth 22 ft, mean depth 16 ft; surface area 154 acres, 74 littoral acres, 2.4 miles of shoreline, per the DNR lake survey.
- Average water clarity (Secchi depth) 8.4 ft.
- Fish species DNR lists here: black bullhead, black crappie, bluegill, common carp, green sunfish, largemouth bass, walleye, yellow bullhead.
- 1 public access on the DNR list.
- Most recent DNR fish survey: (targeted survey).
- Grant County, nearest town Hoffman; DNR lake number (DOW) 26002000.
Depth map
Bathymetric contours from the Minnesota DNR lake survey mapped 7/3/1964 (orig map); depths in feet. Simplified for the web; not for navigation.
Stocking history
| Year | Species | Size | Number | Pounds |
|---|---|---|---|---|
| 2025 | Walleye | fry | 37,000 | 0.3 |
| 2023 | Walleye | fry | 74,000 | 0.6 |
| 2021 | Walleye | fry | 74,000 | 0.7 |
| 2019 | Walleye | fry | 74,000 | 0.6 |
| 2017 | Walleye | fry | 74,000 | 0.7 |
Public accesses
| Type | Owner | Where |
|---|---|---|
| concrete ramp | Minnesota DNR | Located on south side off County Road # 2 |
DNR fish survey, 2023
| Species | Gear | Catch per net | Total catch | Avg lb |
|---|---|---|---|---|
| Largemouth bass | Single-frame trap nets | 10.67 | 32 | 2.43 |
| Bluegill | Single-frame trap nets | 3.67 | 11 | 0.20 |
| Walleye | Single-frame trap nets | 2.67 | 8 | 3.85 |
| Black crappie | Single-frame trap nets | 1.00 | 3 | 0.18 |
| Brassy minnow | 3/8-in trap nets | 5.00 | 10 | 0.00 |
| Largemouth bass | 3/8-in trap nets | 3.50 | 7 | 1.86 |
| Walleye | 3/8-in trap nets | 3.50 | 7 | 3.95 |
| Black crappie | 3/8-in trap nets | 3.00 | 6 | 0.20 |
| Bluegill | 3/8-in trap nets | 1.00 | 2 | 0.12 |
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.
This targeted survey was completed to determine extent of winterkill following the severe 2022-2023 winter. Trap netting results suggested that winterkill severity was low and restorative stockings were not warranted. Gamefish species present included Black Crappie, Bluegill, Largemouth Bass, and Walleye. The majority of fish collected for these species were larger individuals.
Minnesota DNR survey narrative, .
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