Myrtle Lake
Myrtle Lake in Vilas County, Wisconsin has a water quality grade of B (Good). Water clarity: 10.2 ft visibility. Phosphorus: 17.2 µg/L. Maximum depth: 29 ft. Surface area: 28 acres.
Wisconsin DNR lists Panfish as present on Myrtle Lake. DNR survey details →
- Clarity
- 10.2 ft
- Max depth
- 29 ft
- Area
- 28 acres
- Type
- Mesotrophic
- Trend
- ↓ Declining
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Myrtle Lake is a 28-acre mesotrophic lake in Vilas County, Wisconsin with a maximum depth of 29 feet. Water quality is graded B based on 1 sampling years through 2021. Overall water quality is declining over recent sampling years. The lake supports 3 documented fish species including Panfish, Largemouth Bass, and Smallmouth Bass. Compared to the 102 other monitored lakes in Vilas County, Myrtle Lake ranks #64 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2021-08-30. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Good clarity, visible to about 10.2 ft. Phosphorus level: 17.2 µg/L. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.2 ft | Not graded |
| Phosphorus | 17.2 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Myrtle Lake
Compare lakeside cabins, hotels, and vacation rentals near Myrtle Lake in Vilas County, Wisconsin — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Wisconsin DNR lists Panfish as present on Myrtle Lake.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Myrtle Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 7 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2021).
Fish Species (DNR-rated)
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 29 ft |
| Surface Area | 28 acres |
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Myrtle Lake
Water Quality Trend: ↓ Declining
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.196 m/yr | 7 |
| Phosphorus | ↓ Declining | +7.49 µg/L/yr | 7 |
Reservoir Info (USACE NID)
Myrtle 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 · Matched by proximity (0.63 km)
County Ranking
Ranked #64 of 103 lakes in Vilas County
Nearby Lakes in Vilas County
Frequently asked questions about Myrtle Lake
Where is Myrtle Lake?
- Myrtle Lake is a lake in Vilas County, Wisconsin. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Myrtle Lake?
- Myrtle Lake in Vilas County, Wisconsin has a water quality grade of B (Good). Water clarity: 10.2 ft visibility. Phosphorus: 17.2 µg/L. Maximum depth: 29 ft. Surface area: 28 acres.
Is Myrtle Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Myrtle Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
How deep is Myrtle Lake?
- Myrtle Lake has a maximum depth of 29 feet. The lake covers 28 acres.
What fish are in Myrtle Lake?
- Fish species found in Myrtle Lake include Panfish, Largemouth Bass, Smallmouth Bass. Myrtle Lake is located in Vilas County, Wisconsin.
What did the DNR fisheries survey find at Myrtle Lake?
- Wisconsin DNR lists Panfish as present on Myrtle Lake. A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Myrtle Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 7 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
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Where this data comes from
11 measurements from 1 monitoring station, 2020–2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX11 samples · 2020–2021
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Fish and recreation data from Wisconsin DNR Lakes