Lake Tanglewood
Randall County, Texas258 acresView mapDirections
Nutrients and algae run well above the regional average.
- Hypereutrophic
- #1 of 1 in the county
- 20 ft max depth
- Limited data
Lake Tanglewood in Randall County, Texas has a water quality grade of F (Algae-prone). Water clarity: 2.3 ft visibility. Chlorophyll-a (algae): 65.5 µg/L. Surface area: 258 acres.
- Clarity
- 2.3 ft
- Max depth
- ~20 ft est.
- Area
- 258 acres
- Type
- Hypereutrophic
- Chlorophyll-a
- 65.5 µg/L
- Trend
- ↑ Improving
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Stays near Lake Tanglewood
Compare lakeside cabins, hotels, and vacation rentals near Lake Tanglewood in Randall 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 grade measures nutrients and algae, not lodging — cabins and rentals around Lake Tanglewood are listed below.
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Watch Lake Tanglewood’s letter
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Lake Tanglewood is a 258-acre highly nutrient-loaded hypereutrophic lake in Randall County, Texas with an estimated average depth of about 20 feet. Water quality is graded F based on 1 sampling years through 2024. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, TCEQ, last sampled 2024-09-18. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The F is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: F (Algae-prone)
Very murky, less than 2.3 ft of visibility. Chlorophyll-a 65.5 µg/L. TSI 68. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.3 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 65.5 µg/L | Poor |
| Trophic State Index (TSI) | 68 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~20 ft est. |
| Average Depth | ~15 ft est. |
| Surface Area | 258 acres |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Texas has not published bathymetry for Lake Tanglewood.
Lake Size & Watershed
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.
Fishing Lake Tanglewood
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.2 m/yr | 2 |
| Phosphorus | ↑ Improving | -0.5 µg/L/yr | 2 |
| Chlorophyll-a | ↑ Improving | -20.3 µg/L/yr | 2 |
Reservoir Info (USACE NID)
Lake Tanglewood is a man-made reservoir impounded by the Lake Tanglewood Dam (completed 1965), built primarily for flood risk reduction on the Prarie Dog Town Fork Red River; earth-type dam, 83 ft tall and 1,500 ft long.
- Surface area
- 258 ac
- Normal storage
- 4,910 ac-ft
- Max storage
- 15,850 ac-ft
- Drainage area
- 832.7 sq mi
- Hazard class
- High
- Owner
- LAKE TANGLEWOOD INC
All listed purposes: Flood Risk Reduction;Recreation.
Source: USACE National Inventory of Dams, NID ID TX03587 · Operator website
County Ranking
Ranked #1 of 1 lakes in Randall County
Nearby Lakes in Randall County
Frequently asked questions about Lake Tanglewood
Where is Lake Tanglewood?
- Lake Tanglewood is a lake in Randall County, Texas. LakeQuality grades it F for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Tanglewood?
- Lake Tanglewood in Randall County, Texas has a water quality grade of F (Algae-prone). Water clarity: 2.3 ft visibility. Chlorophyll-a (algae): 65.5 µg/L. Surface area: 258 acres.
Is Lake Tanglewood safe to swim in?
- The F is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
How deep is Lake Tanglewood?
- No published bathymetric survey covers Lake Tanglewood, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 20 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 258 acres.
Explore Lake Tanglewood across LakeQuality
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Where this data comes from
14 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Texas Commission on Environmental Quality
TCEQMAIN14 samples · 2020–2024
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)