Pug Hole Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.
Mesotrophic conditions dominate at Pug Hole Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's surface area is not consistently recorded across state datasets — physical context remains partial. Pug Hole Lake sits at rank 61 of 95 in Beltrami County, in the lower half of the local distribution.
Pug Hole Lake is on the Minnesota infested-waters list for zebra mussels — boaters should follow clean-drain-dry protocols when moving gear to or from the lake. The state fisheries records do not list documented species for Pug Hole Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The lake lacks a documented public access point, so visitor use is limited. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-10-15. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Good clarity, visible to about 10.7 ft. Chlorophyll-a: 6.2 µg/L. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.7 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 6.2 µg/L | B |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Pug Hole Lake
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Fishing Pug Hole Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Water Quality Trend: → Stable
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.323 m/yr | 2 |
| Chlorophyll-a | ↓ Declining | +0.87 µg/L/yr | 2 |
Water Temperature
Pug Hole Lake averages about 61°F at the surface in summer, usually warmest in Jul (about 62°F) and coldest in May (about 52°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 70 field readings (2025–2025) via the EPA Water Quality Portal. See the full Pug Hole Lake water temperature breakdown →
Location
County Ranking
Ranked #61 of 95 lakes in Beltrami County
Cleaner Lakes Within 30 Miles
Pug Hole Lake holds Grade B. 2 nearby lakes hold higher grades.
- ACass LakeBeltrami County · mi · Higher grade (B → A)
- ABuck LakeBeltrami County · mi · Higher grade (B → A)
Nearby Lakes in Beltrami County
Explore Pug Hole Lake across LakeGrade
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Moderate nutrients, good water quality
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More records, surveys & data sources
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: 2025-10-15
Monitoring stations: 1