Antelope Lake
Pierce County, North DakotaView mapDirections
ND DEQ publishes the water-quality measurements for Antelope Lake. Here is what has been measured.
- Hypereutrophic
- 76 ft max depth
- Public access
- Limited data
Antelope Lake in Pierce County, North Dakota has water-quality measurements published by ND DEQ, shown here as reported. Water clarity: 3.5 ft visibility. Chlorophyll-a (algae): 43.6 µg/L.
Antelope Lake is a highly nutrient-loaded hypereutrophic lake in Pierce County, North Dakota with an estimated average depth of about 76 feet. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 1 other monitored lakes in Pierce County, Antelope Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, NDDEQ, last sampled 2025-10-01. Methodology: how these readings are compared.
What Antelope Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Antelope Lake 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 Antelope Lake
These are the measurements ND DEQ publishes for Antelope Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 3.5 ft. Chlorophyll-a 43.6 µg/L. TSI 63.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.5ft | 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) | 43.6µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 63 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Antelope Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~76 ft est.
Public access
Yes
Listed by ND DEQ
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. North Dakota has not published bathymetry for Antelope Lake.
Lake Size & Watershed
Watershed (drainage) area
134 sq mi
HydroLAKES / HydroSHEDS
Surface area
1,646 acres
HydroLAKES / HydroSHEDS
Shoreline
14.3 mi
HydroLAKES / HydroSHEDS
Elevation
1,512 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Recreation & Access
- Antelope LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Antelope Lake
Compare lakeside cabins, hotels, and vacation rentals near Antelope Lake in Pierce County, North Dakota — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Antelope Lake are listed below.
Top-rated places to stay near Antelope Lake
Prices for Oct 23–25, 4 adults. Change dates on the map below.
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Planning a trip? Cabins and lodging at Antelope Lake → · more North Dakota lake trips
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Fishing Antelope Lake
Water quality readings over time
2 seasons of samples on record (2020–2025). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Worsening2 years
Nearby Lakes in Pierce County
Frequently asked questions about Antelope Lake
Where is Antelope Lake?
- Antelope Lake is a lake in Pierce 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 Antelope Lake?
- Antelope Lake in Pierce County, North Dakota has water-quality measurements published by ND DEQ, shown here as reported. Water clarity: 3.5 ft visibility. Chlorophyll-a (algae): 43.6 µg/L.
Is Antelope Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Antelope Lake?
- No published bathymetric survey covers Antelope Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 76 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Are there boat ramps on Antelope Lake?
- Antelope Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Antelope Lake. Public access is listed as yes.
Can I fish at Antelope Lake?
- Antelope Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. 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 Antelope Lake across LakeQuality
More lakes in North Dakota
Other Lakes in North Dakota
Hypereutrophic Lakes in North Dakota
Where this data comes from
25 measurements from 2 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North Dakota Department Of Environmental Quality
21NDHDWQ_WQX25 samples · 2020–2025
Analytical methods
- Phosphorus by Colorimetry
- 447.0 ~ EPA; Chlorophyll a and b in phytoplankton by HPLC/UV
- 10200 H ~ Chlorophyll a-b-c Determination
- 4500 NO3 E ~ Nitrate in Water- Cadmium Reduction
Monitoring station identifiers (2)
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Depth, fish, and access data from North Dakota Game & Fish
Named boat-access points from the USGS National Boat Ramps inventory