Martha Lake (Iron County)
Waterbody ID (WBIC): 2314300 — permanent page /lakes/2314300/.
Martha Lake is in Iron County; records show 146 acres and DNR fish-frequency records.
- Size
- 146 acres
- Lake type
- SPRING
- Max depth
- 55 ft
- Mean depth
- 18 ft
- 6 fish species/groups with abundance categories (DNR lake page)
- Fish stocking documented through 2018 (DNR stocking records)
- Summer Secchi clarity median 7.1 ft (field measurements)
- Official DNR depth map available (PDF)
Back to results Show on map Depth map (PDF) Check current DNR regulations
Plan your visit
- Lake directory: public landing — No
- Lake directory: public beach — No
- Lake directory: public park — Yes
Each statement is bounded to its named source; absence of a record is never evidence of no access. The DNR access database may lag reality; posted signs at the landing are authoritative.
Verify at the DNR public boat access program page.
Fishing
The DNR lake page publishes 6 fish species/groups with abundance categories — categories are source labels, never a population count.
DNR fish labels: Largemouth Bass—Common; Musky—Common; Panfish—Common; not population counts.
Stocking records: 3 documented events through 2018, 4,030 fish total. Species: Walleye (Occasional), Muskellunge And Hybrids (Historic). Events in 2015 or later count as recent.
No fisheries survey population estimate is published for this lake in the covered report families.
- Musky reproductive status (DNR mapped): Natural reproduction plus stocking (Cat. 2)
Fishing limits — 2026-2027 season: 19 normalized rows across 19 species entries. Normalized from the DNR ruleset retrieved 2026-08-04. Source text remains authoritative.
Fish species and abundance detail — load details
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Detailed stocking history — load details
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2026-2027 retained fishing rules: 19 published rows for 19 species; effective through 2027-03-07. Check current DNR rules.
Normalized fishing-regulation rows — load details
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Water and setting
- Field-measured summer Secchi clarity: median 7.1 ft from 24 samples, latest sample 2025-08-27
- Satellite clarity estimate: 12.16 ft (2017) — a remote-sensing estimate, kept separate from field measurements
Official DNR depth map (PDF) — Historical lake map; not for navigation. Link checked 2026-07-16.
No public aquatic invasive species occurrence record was found for this lake. The DNR inventory is non-exhaustive; absence of a record is never evidence of absence.
- Public-land proximity (GIS proxy, not access evidence): mapped public land within 1,000 ft; nearest: State Owned Islands (Wisconsin DNR); ≈8% of shoreline buffer
- Shoreline development (landcover proxy, 2025 source): ≈8.8% developed land within 300 m, ≈1.4% impervious
- Road proximity (TIGER proxy, 2025 source): nearest local road or city street ≈22 m; ≈2.7 km of road per km² within 1 km
- Priority Navigable Waterway — basis: musky area, walleye area
Designations are legally defined DNR records shown as their sources state them; no composite rating is implied.
Measured and satellite clarity records — load details
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Data & sources
Published data families
- Fish species and abundance (DNR lake pages)
- Fish stocking history
- Fishing regulations (normalized snapshot)
- Directory access facts (landing, beach, park)
- Satellite water clarity estimate
- Field-measured Secchi clarity
Original records: Wisconsin DNR lake page.
Missing values are unpublished, never zero; each fact above is bounded to its named source and date. Full sourcing detail: Data & methods.