Schoolcraft County Lake Quality
Michigan, 5 lakes, average grade B (Good)
Schoolcraft County has 5 graded lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. With an average grade of B, Schoolcraft County sits comfortably above the Michigan median.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Twilight Lake (A); the most-stressed is Byers Lake (D).
Quick Answers for Schoolcraft County
Planning a trip? Check special fishing regulations for Twilight Lake — or check the official Michigan fishing regulations.
All Lakes in Schoolcraft County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Twilight Lake | A | 15.5 ft | - |
| 2 | Big Island Lake | C | 9.2 ft | - |
| 3 | Byers Lake | D | 4.6 ft | - |
Other Counties in Michigan
See how Schoolcraft County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 15 states.
Where to stay near Schoolcraft County
Top-rated places to stay near Schoolcraft County
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Source: EPA National Aquatic Resource Surveys, 2026.