Grindstone fishing
Grindstone fishing is stocked with Brown Trout, Rainbow Trout, Brook Trout, Lake Trout, Splake, Smallmouth Bass, and 1 more on a natural lake. It is stocked about 5.8 times a year since 2022, most often in January. Species guides list dawn, day, and dusk for Brown Trout, Brook Trout, and Northern Pike, dawn and dusk for Rainbow Trout and Smallmouth Bass, and dawn for Lake Trout.
- Last stocked
- January 1, 2025
- 637 days ago · Rainbow Trout
- Plants on record
- 23
- Since 2022
- Species recorded
- 5
Fish at Grindstone
Rainbow Trout Stocked · 8 plants · last January 1, 2025 Best: dawn, dusk
Brown Trout Stocked · 6 plants · last January 1, 2025 Best: dawn, day, dusk
Brook Trout Stocked · 4 plants · last January 1, 2025 Best: dawn, day, dusk
Lake Trout Stocked · 4 plants · last January 1, 2025 Best: dawn
Splake Stocked · 1 plant · last January 1, 2024
Last stocked January 1, 2024 · 1 plant
Splake species guide 
Smallmouth Bass Confirmed present Best: dawn, dusk
Best: dawn, dusk
Listed in the DNR LakeFinder fish-community record for Grindstone Lake; not present in the stocking feed for this lake. (maps.dnr.state.mn.us, accessed September 29, 2026)
Smallmouth Bass species guide 
Northern Pike Confirmed present Best: dawn, day, dusk
Best: dawn, day, dusk
Listed in the DNR LakeFinder fish-community record for Grindstone Lake; not present in the stocking feed for this lake. (maps.dnr.state.mn.us, accessed September 29, 2026)
Northern Pike species guideHow Grindstone is stocked
The first plant of the year usually falls in the first week of January. In 2025 it was January 1, 2025, about when it usually is.
Fish stocked in 2022
14,547
Fish stocked in 2023
17,827
Fish stocked in 2024
22,266
Fish stocked in 2025
22,869
Stocking history
Showing 5 of 23 plants Showing 23 plants
| Date | Species | Quantity | Avg. length | Source |
|---|---|---|---|---|
| January 1, 2025 | Rainbow Trout | 9,000 | – | report |
| January 1, 2025 | Rainbow Trout | 702 | – | report |
| January 1, 2025 | Lake Trout | 5,250 | – | report |
| January 1, 2025 | Lake Trout | 4,369 | – | report |
| January 1, 2025 | Brown Trout | 350 | – | report |
| January 1, 2025 | Brown Trout | 2,150 | – | report |
| January 1, 2025 | Brook Trout | 71 | – | report |
| January 1, 2025 | Brook Trout | 977 | – | report |
| January 1, 2024 | Splake | 10,454 | – | report |
| January 1, 2024 | Rainbow Trout | 9,000 | – | report |
| January 1, 2024 | Rainbow Trout | 112 | – | report |
| January 1, 2024 | Brown Trout | 2,500 | – | report |
| January 1, 2024 | Brook Trout | 200 | – | report |
| January 1, 2023 | Rainbow Trout | 9,000 | – | report |
| January 1, 2023 | Rainbow Trout | 30 | – | report |
| January 1, 2023 | Lake Trout | 6,000 | – | report |
| January 1, 2023 | Lake Trout | 87 | – | report |
| January 1, 2023 | Brown Trout | 953 | – | report |
| January 1, 2023 | Brown Trout | 1,637 | – | report |
| January 1, 2023 | Brook Trout | 120 | – | report |
| January 1, 2022 | Rainbow Trout | 12,000 | – | report |
| January 1, 2022 | Rainbow Trout | 47 | – | report |
| January 1, 2022 | Brown Trout | 2,500 | – | report |
Show all 23 plants + Show less
Access and facts
- Water type
- natural lake
- Nearest town
- Sandstone, MN
- Boat ramp
- Yes
MN DNR LakeFinder lists an open DNR concrete/boat access on the northwest side of Grindstone Lake (DOW 58012300). Nearest town on the DNR record is Sandstone.