Fishing Regulations · 2026 season
Foss Lake Fishing Regulations
Foss Lake follows Minnesota statewide fishing regulations — no lake-specific special rules in DNR records.
Foss Lake pulls a D on the LakeGrade rubric — phosphorus loading and limited clarity hold it below the Minnesota average. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.
A TSI in the eutrophic range signals a lake doing what nutrient-loaded waters do — supporting an active algal community at the cost of clear water. Foss Lake is a shallow lake at 6 ft maximum depth, which means it warms quickly, mixes constantly, and amplifies nutrient inputs. Foss Lake is small — 36 acres alongside 1.1 miles of shoreline — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Foss Lake ranks 198 of 215 in St. Louis County — at the lower end of the locally monitored distribution.
Full water-quality breakdown: Foss Lake water-quality report.
Minnesota Statewide Regulations
These apply to Foss Lake (no lake-specific overrides found).
- Walleye
Statewide bag limit: 6 walleye, only 1 over 20 inches. Possession limit 6 (varies on border waters). Open season typically May 9 — Feb 28.
- Sauger
Statewide bag limit: 6 sauger or walleye-sauger combined. Open season typically May 9 — Feb 28.
- Northern Pike
Statewide three-zone northern pike regs: north zone (10 fish, all sizes); central (2 fish 22–26", plus 8 under 22"); south (2 fish over 24"). See MN DNR for zone map.
- Largemouth Bass · Smallmouth Bass
Statewide bag limit: 6 in combination. Catch-and-release only in late season for some lakes; harvest typically opens late May. Some lakes have special slot or season rules.
- Muskellunge
Statewide minimum 54 inches, daily limit 1. Catch-and-release strongly encouraged due to high mercury and slow growth.
- Lake Trout · Brook Trout · Brown Trout · Rainbow Trout · Splake
Stream trout limit 5 per day; lake trout limit varies by lake (often 2). Designated Trout Lakes have special regulations and require trout stamp.
- Sunfish · Bluegill · Crappie · Yellow Perch
Statewide combined bag limit: 20 sunfish, 10 crappies, 20 yellow perch (some lakes have reduced panfish limits to protect quality).
Always Verify with the Official Source
Fishing regulations change annually. Before you fish Foss Lake, check the official Minnesota DNRfor the most current rules — including border-water exceptions, emergency closures, and 2026 season dates.
Official MN DNR LakeFinder →Frequently Asked Questions
Are there special fishing regulations on Foss Lake?
Foss Lake appears to follow Minnesota statewide fishing regulations — DNR records do not show lake-specific special rules. Always confirm with current DNR regulations before fishing, since rules can change annually.
What is the walleye limit on Foss Lake?
Statewide MN walleye limit: 6 fish, only 1 over 20 inches. Open season May 9 — Feb 28. Foss Lake appears to follow this statewide rule.
When does the Minnesota fishing season open at Foss Lake?
Minnesota's general fishing opener for walleye, northern pike, and lake trout falls on the Saturday closest to May 12 each year — for 2026, that's typically the second weekend of May. Bass season opens later (late May for catch-and-release, mid-June for harvest in many lakes). Panfish are open year-round on most waters.
Do I need a fishing license at Foss Lake?
Yes. Anyone 16 or older needs a current Minnesota fishing license to fish Foss Lake. Some species require additional stamps (trout, salmon, musky in WI). Buy online at the MN DNR website or at any authorized retailer.
Related
Regulations sourced from Minnesota DNR LakeFinder (DOW 69031400), 2026 season. Last updated: 2026-07-06. This site is not affiliated with any government agency. Always confirm rules with the official DNR before fishing.