Pine Island Lake

On the LakeGrade scale Pine Island Lake grades a B, with clarity at 14.5 ft and phosphorus readings still being added placing it above the Minnesota median.

Trophically, Pine Island Lake reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. The lake bottoms out at 26 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. Pine Island Lake covers 238 acres alongside 3.2 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Within Todd County's 17 graded lakes, Pine Island Lake ranks 9 — below the local median, though not at the bottom.

No invasive species are currently listed at Pine Island Lake — the lake remains off the Minnesota infested-waters roster. The fishery includes walleye among the lake's 11 documented species — a notable draw for Minnesota anglers. A documented public access point at Pine Island Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. Ice-out has been recorded 14 times at Pine Island Lake, with a median around Apr 6. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.