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LakeQuality
B

Little Tamarack Flowage Lake

Vilas County, WisconsinMesotrophic

On the LakeGrade scale Little Tamarack Flowage Lake grades a B, with clarity at 8.2 ft and 16 µg/L of phosphorus placing it above the Wisconsin median. Clarity is the limiting factor — phosphorus is reasonable but suspended particles or algal cells keep water transparency below Wisconsin norms.

The lake sits in the mesotrophic zone — the band where most well-managed Wisconsin lakes fall. The lake bottoms out at 16 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. Little Tamarack Flowage Lake covers 236 acres alongside partial shoreline records — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Little Tamarack Flowage Lake ranks 88 of 191 in Vilas County — solidly in the upper half of the local distribution.

Little Tamarack Flowage Lake has no invasive species recorded in Wisconsin state databases as of 2025, though prevention practices still apply at all access points. The fishery is bass-led, with 4 documented species across the lake's records. A documented public access point at Little Tamarack Flowage Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-10-08. Grade methodology: LakeGrade methodology.

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Moderate clarity, visible to about 8.2 ft. Phosphorus level: 16 µg/L. Trophic State Index: 45.

MetricValueGrade
Water Clarity (Secchi Depth)8.2 ftC
Phosphorus16 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)45Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth16 ft
Surface Area236 acres
Public AccessYes

Fish Species

Click a species to see every graded lake where it is documented.

→ Best fishing times for Little Tamarack Flowage Lake (14-day solunar calendar)

→ Is it safe to eat fish from Little Tamarack Flowage Lake? (mercury & PFAS guide)

Little Tamarack Flowage Lake fishing regulations (limits, seasons, special rules)

Water Quality Trend: Declining

Based on 7 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-0.196 m/yr7
Phosphorus Stable-0.3 µg/L/yr6
See year-by-year chart →

Recreation & Access

1
Boat Landings
Yes
Public Access

Location

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County Ranking

Ranked #88 of 191 lakes in Vilas County

Cleaner Lakes Within 30 Miles

Little Tamarack Flowage Lake holds Grade B. 4 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Vilas County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 2007. 2 stations on file (most recent sample 2025).

DNR Assessment
Excellent · Shallow Lowland lake
Trophic State Index 46 (mesotrophic) · 5-year average

Fish Species (DNR-rated)

Panfish(Common)Largemouth Bass(Common)Northern Pike(Common)Musky(Present)

Reservoir Info (USACE NID)

Little Tamarack Flowage Lake is a man-made reservoir impounded by the Little Tamarack Flowage on the Little Tamarack Creek; earth-type dam, 10 ft tall.

Surface area
200 ac
Normal storage
2,000 ac-ft
Max storage
2,490 ac-ft
Drainage area
25 sq mi
Hazard class
Low
Owner
Little Tamarack Flowage, Baker Spring Lake District

Source: USACE National Inventory of Dams, NID ID WI20051 · Operator website

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Fish and recreation data from Wisconsin DNR Lakes

Public boat-access points from the USGS National Boat Ramps inventory

Most recent sample: 2025-10-08

Monitoring stations: 1

Where to stay near Little Tamarack Flowage Lake

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