Ray Roberts Lake Site
Denton County, TexasView mapDirections
TCEQ publishes the water-quality measurements for Ray Roberts Lake Site. Here is what has been measured.
- Eutrophic
- 91 ft max depth
- Public access
Ray Roberts Lake Site in Denton County, Texas has water-quality measurements published by TCEQ, shown here as reported. Water clarity: 3.9 ft visibility. Phosphorus: 20.1 µg/L. Chlorophyll-a (algae): 15.6 µg/L.
Ray Roberts Lake Site is a productive, nutrient-rich eutrophic lake in Denton County, Texas with an estimated average depth of about 91 feet. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 6 public boat landings. Compared to the 5 other monitored lakes in Denton County, Ray Roberts Lake Site ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, TCEQ, last sampled 2025-12-17. Methodology: how these readings are compared.
What Ray Roberts Lake Site is good for
From access and monitoring records, not editorial picks.
- Boat launch6 documented ramps
Swimming conditions
Readings onlyAlgae risk
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 Ray Roberts Lake Site is safe to swim in today is a call for the Texas Commission on Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Ray Roberts Lake Site
These are the measurements TCEQ publishes for Ray Roberts Lake Site, 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 3.9 ft. Phosphorus 20.1 µg/L. Chlorophyll-a 15.6 µg/L. TSI 54.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.9ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 20.1µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 15.6µg/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. | 54 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Ray Roberts Lake Site
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~91 ft est.
Public access
Yes
Listed by TCEQ
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Texas has not published bathymetry for Ray Roberts Lake Site.
Lake Size & Watershed
Watershed (drainage) area
688 sq mi
HydroLAKES / HydroSHEDS
Surface area
16,979 acres
HydroLAKES / HydroSHEDS
Shoreline
65 mi
HydroLAKES / HydroSHEDS
Elevation
636 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
- Ray Roberts Lake State Park - Buck CreekPublic
- Ray Roberts MarinaPublic
- State Park, Johnson Branch UnitPublic
- Lake Ray Roberts State Park - Pond CreekPublic
- Lake Ray Roberts State Park - Isle du BoisPublic
- Lake Ray Roberts State Park - SangerSemi-private
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Ray Roberts Lake Site
Compare lakeside cabins, hotels, and vacation rentals near Ray Roberts Lake Site in Denton County, Texas — 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 Ray Roberts Lake Site are listed below.
Top-rated places to stay near Ray Roberts Lake Site
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
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Fishing Ray Roberts Lake Site
Water Quality Trend: Worsening
Based on 4 years of monitoring (2020–2023).
Water clarity
Worsening4 years
Nearby Lakes in Denton County
Frequently asked questions about Ray Roberts Lake Site
Where is Ray Roberts Lake Site?
- Ray Roberts Lake Site is a lake in Denton County, Texas. Its water-quality measurements are published by TCEQ and shown on this page as reported.
What is the water quality of Ray Roberts Lake Site?
- Ray Roberts Lake Site in Denton County, Texas has water-quality measurements published by TCEQ, shown here as reported. Water clarity: 3.9 ft visibility. Phosphorus: 20.1 µg/L. Chlorophyll-a (algae): 15.6 µg/L.
Is Ray Roberts Lake Site safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Ray Roberts Lake Site?
- No published bathymetric survey covers Ray Roberts Lake Site, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 91 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 Ray Roberts Lake Site?
- Ray Roberts Lake Site has 6 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Ray Roberts Lake State Park - Buck Creek, Ray Roberts Marina, State Park, Johnson Branch Unit, Lake Ray Roberts State Park - Pond Creek, among others. Public access is listed as yes.
Can I fish at Ray Roberts Lake Site?
- Ray Roberts Lake Site has 6 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Texas's fish and wildlife agency, so check its current regulations before you go.
Explore Ray Roberts Lake Site across LakeQuality
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Where this data comes from
121 measurements from 3 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Texas Commission on Environmental Quality
TCEQMAIN121 samples · 2020–2025
Monitoring station identifiers (3)
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)
Named boat-access points from the USGS National Boat Ramps inventory