Castle Rock Dam Lake vs Mirror Lake
Water quality, depth, fish species, and recreation comparison.
Castle Rock Dam Lake has a higher water quality grade (D, Poor) than Mirror Lake (F, Very Poor). Both are in Wisconsin.
Both Castle Rock Dam Lake and Mirror Lake sit in North Dakota. A same-state comparison strips out the state-level water-quality regime as a variable: any grade differences here are about the lakes themselves, not the agencies grading them. These two are within a letter of each other on the rubric — Castle Rock Dam Lake (D) versus Mirror Lake (F). The deciding factors for a recreational visitor are likely physical (depth, access, fish species) rather than water-quality differences.
With grades this close, the choice between the two lakes turns on non-water-quality factors: depth, fish species, public access, distance from home. The per-lake pages below cover all of those.
Castle Rock Dam Lake
Murky, only visible to about 3.8 ft.
Mirror Lake
Very murky, less than 2.1 ft of visibility.
Side-by-Side Metrics
| Metric | Castle Rock Dam Lake | Mirror Lake |
|---|---|---|
| Overall Grade | D (Poor) | F (Very Poor) |
| Water Clarity | 3.8 ft | 2.1 ft |
| Phosphorus | No data | No data |
| Chlorophyll-a (Algae) | 24.3 µg/L | 31.6 µg/L |
| Maximum Depth | - | - |
| Surface Area | 14.2 acres | 94.33 acres |
| Public Access | Unknown | Unknown |
| Fish Species | 0 | 0 |
| Trophic State | eutrophic | eutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Castle Rock Dam Lake wins on overall water quality with a Grade D versus Mirror Lake's Grade F. Water clarity: 3.8 ft vs 2.1 ft. For fishing diversity, Castle Rock Dam Lake also leads with 0 species.