See every public fishing venue in Minnesota on the map, with boat ramps, camping, parking and full rules for each one.
Portsmouth Mine Lake is a public lake in Crow Wing County, Minnesota, managed by Minnesota DNR (public waters). The shoreline and water are open to the public. Public access confirmed via MN DNR public water.
A designated stream-trout lake — stocked rainbow, brown, brook trout and sometimes splake. A trout stamp is required.
Portsmouth Mine Lake covers about 150 acres in the Northern Lakes region. Anglers here mostly fish for rainbow trout, brown trout, brook trout, splake; northern pike, largemouth bass, yellow perch are also on record. The nearest other mapped waters on PiscaMaps are Armour #2 Mine and Armour #2 Mine Lake.
Species from MN DNR LakeFinder and fishery survey data.
Night fishing: No general night-fishing closure in Minnesota. Some designated trout lakes and streams close overnight or have a shortened season, and a few border waters have their own hours — check the current MN DNR regulations for this water.
Boats: Boats and motors are allowed on public waters; some lakes carry no-wake or horsepower limits. AIS law is enforced statewide — drain water, remove plants/mussels, and dry or decontaminate before leaving the access.
Bank & bivvy camping: Camp at state parks, state forest campgrounds, WMAs and DNR rustic campsites; the Boundary Waters needs a BWCA permit. Dispersed shoreline camping outside designated sites is generally not allowed.
Tackle: This is a designated Minnesota trout water. A trout stamp is required, and special season, gear and limit rules apply — check the MN DNR trout regulations for this water.
Rules verified 2026-09-02 against MN DNR regulations. Always confirm the current rules before you fish.
Boat ramps: 1 mapped — Boat ramp.
Camping: 3 sites mapped nearby — Portsmouth Campground, True North Basecamp, Crosby Memorial City Park Campground.
Source: OpenStreetMap contributors.
Anyone 16 or older needs a Minnesota fishing licence. Non-resident annual is about $52; a 72-hour non-resident licence is about $40 and a 24-hour about $14. A trout stamp (about $10) is required to fish trout waters. Buy online at the MN DNR. Every angler 16+ needs a Minnesota fishing licence; a trout stamp is required to fish or possess trout on most trout waters. AIS rules apply — drain, clean and dry before leaving any access.
Every water carries species, bank & boat access, current regulations and live water conditions — and members get Swim Mapper, Catch Logger and Trip Planner. It's the only US map with a dedicated carp-water layer.
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