Little Lake Twenty is a 128-acre mesotrophic lake in Gladwin County, Michigan. Water quality is graded C based on 1 sampling years through 2022. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available. Compared to the 8 other monitored lakes in Gladwin County, Little Lake Twenty ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2022-09-10. Grade methodology: LakeGrade methodology.
Watch Little Lake Twenty water quality
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Moderate clarity, visible to about 9 ft. Trophic State Index: 45.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 128 acres |
| Public Access | Yes |
Where to stay near Little Lake Twenty
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Fishing Little Lake Twenty
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1.106 m/yr | 4 |
Location
County Ranking
Ranked #6 of 9 lakes in Gladwin County
Cleaner Lakes Within 30 Miles
Little Lake Twenty holds Grade C. 2 nearby lakes hold higher grades.
Nearby Lakes in Gladwin County
Explore Little Lake Twenty across LakeGrade
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Species activity outlook by water temperature and season
Where to stay at Michigan's top lakes, each with its grade
Moderate nutrients, good water quality
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Reservoir Info (USACE NID)
Little Lake Twenty is a man-made reservoir impounded by the Scottish Hills Lake Dam (completed 1974), built primarily for recreation on the Lake Twenty Outlet; earth-type dam, 14 ft tall and 200 ft long.
- Surface area
- 128 ac
- Normal storage
- 1,350 ac-ft
- Max storage
- 2,100 ac-ft
- Drainage area
- 3.6 sq mi
- Hazard class
- Low
- Owner
- Scottish Hills Condominium Assn
Source: USACE National Inventory of Dams, NID ID MI00656 · Operator website · Matched by proximity (0.72 km)
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Data Sources
Water quality data from the EPA Water Quality Portal
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2022-09-10
Monitoring stations: 1