Twilight Lake
Schoolcraft County, Michigan56 acresView mapDirections
EGLE publishes the water-quality measurements for Twilight Lake. Here is what has been measured.
- 45 ft max depth
- Limited data
Twilight Lake in Schoolcraft County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 13 ft visibility. Maximum depth: 45 ft. Surface area: 56.3 acres.
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.
Twilight Lake is a 56-acre lake in Schoolcraft County, Michigan with a maximum depth of 45 feet. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2023-09-12. Methodology: how these readings are compared.
What Twilight Lake is good for
From access and monitoring records, not editorial picks.
- Clear water13 ft of visibility
- Deep water45 ft surveyed max depth
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Twilight Lake is safe to swim in today is a call for the Michigan Department of Environment, Great Lakes, and Energy (EGLE) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Twilight Lake
These are the measurements EGLE publishes for Twilight Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 13 ft. TSI 40.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 13ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 40 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Twilight Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Twilight Lake typically sits around 67°F at the surface in September. Summer average is about 76°F. Usually warmest in Jul (about 76°F) and coldest in Sep (about 67°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (67°F) to its warmest (76°F).
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 →
Lake Details
Max depth
45 ft
Surface area
56 acres
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Stays near Twilight Lake
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Follow Twilight Lake’s readings
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Fishing Twilight Lake
Water quality readings over time
3 seasons of samples on record (2017–2023). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Worsening3 years
Nearby Lakes in Schoolcraft County
Frequently asked questions about Twilight Lake
Where is Twilight Lake?
- Twilight Lake is a lake in Schoolcraft County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Twilight Lake?
- Twilight Lake in Schoolcraft County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 13 ft visibility. Maximum depth: 45 ft. Surface area: 56.3 acres.
Is Twilight Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Twilight Lake?
- Twilight Lake typically sits around 67°F at the surface in September, from 8 EPA Water Quality Portal field readings (2011–2023). That is a typical value for the month, not a live reading.
How deep is Twilight Lake?
- Twilight Lake has a maximum depth of 45 feet. The lake covers 56.3 acres.
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Where this data comes from
3 measurements from 1 monitoring station, 2017–2023. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- Eastern Regional Office
USFSEASTERN3 samples · 2017–2023
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.