Twilight Lake is a cold, clear oligotrophic lake in Schoolcraft County, Michigan. Water quality is graded A based on 1 sampling years through 2023. Overall water quality is declining over recent sampling years. Compared to the 4 other monitored lakes in Schoolcraft County, Twilight Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2023-09-12. Grade methodology: LakeGrade methodology.
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Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Crystal clear, you can see 15.5 ft down. Trophic State Index: 38.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 15.5 ft | A |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 38 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Twilight Lake
Compare lakeside cabins, hotels, and vacation rentals near Twilight Lake in Schoolcraft County, Michigan — 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.
Top-rated places to stay near Twilight Lake
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Fishing Twilight Lake
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -3.125 m/yr | 2 |
Water Temperature
Twilight Lake averages about 76°F at the surface in summer, usually warmest in Jul (about 76°F) and coldest in Sep (about 67°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 8 field readings (2011–2023) via the EPA Water Quality Portal. See the full Twilight Lake water temperature breakdown →
Location & Depth Map
Free interactive depth-contour map of Twilight Lake, reaching a maximum surveyed depth of 45 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
County Ranking
Ranked #1 of 5 lakes in Schoolcraft County
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Low nutrients, clear water, excellent for swimming
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Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-09-12
Monitoring stations: 1