Big Portage Lake vs Black Oak Lake
Water quality, depth, fish species, and recreation comparison.
Big Portage Lake and Black Oak Lake both received the same overall water quality grade of A (Excellent). Both are in Vilas County, Wisconsin.
A
Big Portage Lake
Vilas County, Wisconsin
Crystal clear, you can see 62.3 ft down.
A
Black Oak Lake
Vilas County, Wisconsin
Crystal clear, you can see 88.6 ft down.
Side-by-Side Metrics
| Metric | Big Portage Lake | Black Oak Lake |
|---|---|---|
| Overall Grade | A (Excellent) | A (Excellent) |
| Water Clarity | 62.3 ft | 88.6 ft |
| Phosphorus | 11.7 µg/L | 10.2 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 40 ft | 85 ft |
| Surface Area | 586 acres | 564 acres |
| Public Access | Yes | Yes |
| Fish Species | 4 | 6 |
| Trophic State | oligotrophic | oligotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Both lakes earn the same Grade A. The tiebreakers come down to clarity (Big Portage Lake: 62.3 ft, Black Oak Lake: 88.6 ft) and what you want from the lake. Big Portage Lake has fewer fish species than Black Oak Lake.