Belcourt Lake Beach
Rolette County, North Dakota827 acresView mapDirections
ND DEQ publishes the water-quality measurements for Belcourt Lake Beach. Here is what has been measured.
- Public access
- Limited data
Belcourt Lake Beach in Rolette County, North Dakota has water-quality measurements published by ND DEQ, shown here as reported. Water clarity: 1 ft visibility. Surface area: 827 acres.
Belcourt Lake Beach is a 827-acre lake in Rolette County, North Dakota. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, NDDEQ, last sampled 2025-09-10. Methodology: how these readings are compared.
Belcourt Lake Beach covers about 830 acres in Rolette County. For a place on the water, look through cabin and lake-house rentals near Belcourt Lake Beach on Vrbo. For a hotel or motel room, Booking.com and Expedia both search around the lake.
Swimming conditions
No readingBacteria tested: exceedances
Based on E. coli testing, Belcourt Lake Beach occasionally exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 5.3% of 38 samples across 7 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check North Dakota’s current beach and health-department advisories before swimming.
Whether Belcourt Lake Beach is safe to swim in today is a call for the North Dakota Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Belcourt Lake Beach
These are the measurements ND DEQ publishes for Belcourt Lake Beach, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 1 ft of visibility. TSI 77.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 77 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Belcourt Lake Beach
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Belcourt Lake Beach typically sits around 69°F at the surface in August. Summer average is about 69°F. Usually warmest in Jul (about 73°F) and coldest in Jun (about 65°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (65°F) to its warmest (73°F).
Typical surface water temperature by month, from 9 field readings (2012–2025) via the EPA Water Quality Portal.
Lake Details
Surface area
827 acres
Public access
Yes
Listed by ND DEQ
No bathymetric survey has been published for Belcourt Lake Beach, so its depth is not documented here.
Stays via Stay22
Stays near Belcourt Lake Beach
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Top-rated places to stay near Belcourt Lake Beach
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Fishing Belcourt Lake Beach
Water Quality Trend: Worsening
Based on 5 years of monitoring (2021–2025).
Water clarity
Improving5 years
Phosphorus
Worsening+3.25 µg/L/yr5 years
Chlorophyll-a
Worsening+0.3 µg/L/yr4 years
Reservoir Info (USACE NID)
Belcourt Lake Beach is a man-made reservoir impounded by the Belcourt Lake (completed 1930), built primarily for recreation on the Ox Creek; earth-type dam, 13 ft tall and 700 ft long.
- Surface area
- 827 ac
- Normal storage
- 5,651 ac-ft
- Max storage
- 9,159 ac-ft
- Drainage area
- 28.4 sq mi
- Hazard class
- High
- Owner
- BIA
All listed purposes: Recreation;Fish and Wildlife Pond;Water Supply.
Source: USACE National Inventory of Dams, NID ID ND00535 · Operator website · Matched by proximity (0.13 km)
Nearby Lakes in Rolette County
Frequently asked questions about Belcourt Lake Beach
Where is Belcourt Lake Beach?
- Belcourt Lake Beach is a lake in Rolette County, North Dakota. Its water-quality measurements are published by ND DEQ and shown on this page as reported.
What is the water quality of Belcourt Lake Beach?
- Belcourt Lake Beach in Rolette County, North Dakota has water-quality measurements published by ND DEQ, shown here as reported. Water clarity: 1 ft visibility. Surface area: 827 acres.
Is Belcourt Lake Beach safe to swim in?
- Based on E. coli testing, Belcourt Lake Beach occasionally exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 5.3% of 38 samples across 7 seasons. That is a historical summary of past bacteria testing, not a current reading and not a swimming clearance. Bacteria levels can spike quickly after heavy rain, so whether Belcourt Lake Beach is safe to swim in today is a call for North Dakota's water agency and the county health department; check their current beach advisories before you swim.
What is the water temperature of Belcourt Lake Beach?
- Belcourt Lake Beach typically sits around 69°F at the surface in August, from 9 EPA Water Quality Portal field readings (2012–2025). That is a typical value for the month, not a live reading.
Can I fish at Belcourt Lake Beach?
- Public access to Belcourt Lake Beach is listed as yes on the lake record. Seasons, size and bag limits, and whether you need a license are set by North Dakota's fish and wildlife agency, so check its current regulations before you go.
Explore Belcourt Lake Beach across LakeQuality
Depth, room, public access, and the state wake-sport rules
Species activity outlook by water temperature and season
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Where this data comes from
20 measurements from 1 monitoring station, 2022–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Turtle Mountain Environmental Office (Tribal)
TURTLEMT20 samples · 2022–2025
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Depth, fish, and access data from North Dakota Game & Fish