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LakeQuality

Belcourt Inlet Lake vs Belourt Outlet Lake

Water quality, depth, fish species, and recreation comparison.

Belcourt Inlet Lake and Belourt Outlet Lake both received the same overall water quality grade of D (Poor). Both are in Rolette County, North Dakota.

Reviewed by LakeQuality Editorial Team · Updated

Belcourt Inlet Lake and Belourt Outlet Lake are both in North Dakota — a same-state head-to-head where the comparison comes down to lake-specific differences in depth, watershed, and monitoring history rather than the broader state-level water-quality regime. The grades are close: Belcourt Inlet Lake (D) and Belourt Outlet Lake (D) are within one letter of each other on the LakeGrade rubric. The per-parameter sub-grades below will show where the small differences actually live.

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.

D

Belcourt Inlet Lake

Rolette County, North Dakota

Very murky, less than 3.3 ft of visibility.

D

Belourt Outlet Lake

Rolette County, North Dakota

Very murky, less than 3 ft of visibility.

Side-by-Side Metrics

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

MetricBelcourt Inlet LakeBelourt Outlet Lake
Overall GradeD (Poor)D (Poor)
Water Clarity3.3 ft3 ft
PhosphorusNo dataNo data
Chlorophyll-a (Algae)10.7 µg/L12.5 µg/L
Maximum Depth24.5 ft24.5 ft
Surface Area634.6 acres827 acres
Public AccessUnknownUnknown
Fish Species33
Trophic Stateeutrophiceutrophic

Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).

Verdict

Both lakes earn the same Grade D. The tiebreakers come down to clarity (Belcourt Inlet Lake: 3.3 ft, Belourt Outlet Lake: 3 ft) and what you want from the lake. Belcourt Inlet Lake matches its peer on species count.