Lake Lancelot is a 250-acre mesotrophic lake in Gladwin County, Michigan. Water quality is graded C based on 1 sampling years through 2021. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 2 public boat landings. Compared to the 8 other monitored lakes in Gladwin County, Lake Lancelot ranks #8 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2021-09-13. Grade methodology: LakeGrade methodology.
Watch Lake Lancelot 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 9.3 ft. Trophic State Index: 45.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.3 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 | 250 acres |
| Public Access | Yes |
Where to stay near Lake Lancelot
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Fishing Lake Lancelot
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +2.675 m/yr | 2 |
| Chlorophyll-a | ↑ Improving | -0.3 µg/L/yr | 3 |
Recreation & Access
Water Temperature
Lake Lancelot averages about 76°F at the surface in summer, usually warmest in Jul (about 78°F) and coldest in May (about 65°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 149 field readings (2015–2019) via the EPA Water Quality Portal.
Location
County Ranking
Ranked #8 of 9 lakes in Gladwin County
Cleaner Lakes Within 30 Miles
Lake Lancelot holds Grade C. 4 nearby lakes hold higher grades.
- AIsland Lake Central Basin; Sherman TownshipGladwin County · 6.1 mi · Two grade letters higher (C → A)
- ALancer Lake SoutheastGladwin County · 1.2 mi · Two grade letters higher (C → A)
- BLancelot Lake Southwest BasinGladwin County · 0.6 mi · Higher grade (C → B)
- BGrass LakeGladwin County · 6.5 mi · Higher grade (C → B)
Nearby Lakes in Gladwin County
Explore Lake Lancelot across LakeGrade
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Species activity outlook by water temperature and season
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Moderate nutrients, good water quality
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Other Grade C Lakes in Michigan
Mesotrophic Lakes in Michigan
More records, surveys & data sources
Reservoir Info (USACE NID)
Lake Lancelot is a man-made reservoir impounded by the Lake Lancelot Dam (completed 1976), built primarily for recreation on the Tributary to Sugar River; earth-type dam, 17 ft tall and 1,400 ft long.
- Surface area
- 250 ac
- Normal storage
- 1,950 ac-ft
- Max storage
- 2,100 ac-ft
- Drainage area
- 4.9 sq mi
- Hazard class
- Low
- Owner
- Gladwin County Drain Commissioner
Source: USACE National Inventory of Dams, NID ID MI00488 · Operator website
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
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2021-09-13
Monitoring stations: 1