Fishing at Portsmouth Mine, Minnesota
149-acre lake · Crow Wing County · 1 species stocked
Portsmouth Mine sits at 0 feet — low-elevation, warmer-water in Crow Wing County, Minnesota, covering 149 acres of lake water. The state stocked the lake most recently on January 01, 2024, with 7,000 Rainbow Trout averaging 0.0 inches. It's been an active stocking water since at least 0, and the recent records below tell you what's been planted and when.
Recent Stocking Reports
The most recent 10 stocking events on record for Portsmouth Mine:
| Date | Species | Quantity | Avg size |
|---|---|---|---|
| Jan 1, 2024 | 🐟 Rainbow Trout | 7,000 | 0.0″ |
| Jan 1, 2023 | 🐟 Rainbow Trout | 92 | 0.0″ |
| Jan 1, 2023 | 🐟 Rainbow Trout | 7,000 | 0.0″ |
| Jan 1, 2022 | 🐟 Rainbow Trout | 7,000 | 0.0″ |
| Jan 1, 2022 | 🐟 Rainbow Trout | 36 | 0.0″ |
| Jan 1, 2021 | 🐟 Rainbow Trout | 59 | 0.0″ |
| Jan 1, 2021 | 🐟 Rainbow Trout | 7,000 | 0.0″ |
| Jan 1, 2020 | 🐟 Rainbow Trout | 7,000 | 0.0″ |
| Jan 1, 2020 | 🐟 Rainbow Trout | 54 | 0.0″ |
| Jan 1, 2019 | 🐟 Rainbow Trout | 71 | 0.0″ |
Species You Can Catch
Where to Catch Rainbow Trout in Minnesota
If you're targeting one of the species stocked in Portsmouth Mine, the state-level guide ranks the top lakes by stocking volume — a good supplement to this page when planning a trip:
Best Time to Fish Portsmouth Mine
For rainbow trout, the best fishing on Portsmouth Mine is typically in spring and fall, when surface temperatures fall in the 55–70°F range. That window matches the active feeding period for the species and aligns with lake thermal turnover, putting fish in predictable depths and structure. Check the recent stocking dates above — fish are easiest to locate in the first two to four weeks after a planting.
Nearby Lakes
Other stocked waters within ~75 miles of Portsmouth Mine:
- Mahnomen, Alstead & Arco — 1.4 mi (272 ac)
- Menomin Lake — 1.6 mi (209 ac)
- Mahnomen — 1.6 mi (238 ac)
- Serpent — 1.9 mi (1,116 ac)
- Serpent Lake — 2.0 mi (1,110 ac)
- Black Hoof — 2.5 mi (201 ac)
- Agate — 2.6 mi (187 ac)
- Rabbit (West Portion) — 3.1 mi (536 ac)
Fishing Regulations
A valid Minnesota fishing license is required at Portsmouth Mine. Buy one online and check current regulations at the Minnesota DNR. Always confirm seasonal closures, size limits, and creel limits before fishing.
Frequently Asked Questions
What fish are stocked in Portsmouth Mine?
Portsmouth Mine has been stocked with Rainbow Trout.
When was Portsmouth Mine last stocked?
The most recent stocking on record was Jan 1, 2024, when 7,000 rainbow trout were planted.
Do I need a fishing license for Portsmouth Mine?
Yes — a valid Minnesota fishing license is required. Purchase one online from the Minnesota DNR.