Lake Conroe
Montgomery County, TexasView mapDirections
TCEQ publishes the water-quality measurements for Lake Conroe. Here is what has been measured.
- Eutrophic
- 47 ft max depth
- Public access
Lake Conroe in Montgomery County, Texas has water-quality measurements published by TCEQ, shown here as reported. Water clarity: 2.2 ft visibility. Phosphorus: 70 µg/L.
Lake Conroe is a productive, nutrient-rich eutrophic lake in Montgomery County, Texas with an estimated average depth of about 47 feet. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 28 public boat landings.
Source: EPA Water Quality Portal sampling records, TCEQ, last sampled 2023-12-21. Methodology: how these readings are compared.
Lake Conroe has 28 public boat landings, so a lakefront rental is not the only way to get a boat on the water. Vrbo is where to look for cabins and lake homes around Lake Conroe, and Booking.com and Expedia search hotels near the lake for your dates.
What Lake Conroe is good for
From access and monitoring records, not editorial picks.
- Boat launch28 documented ramps
Swimming conditions
Readings onlyElevated nutrients
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 Lake Conroe 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 Lake Conroe
These are the measurements TCEQ publishes for Lake Conroe, 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 2.2 ft of visibility. Phosphorus 70 µg/L. TSI 65.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 70µg/L | Poor GoodFairPoor |
| 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. | 65 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Lake Conroe
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~47 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 Lake Conroe.
Lake Size & Watershed
Watershed (drainage) area
455 sq mi
HydroLAKES / HydroSHEDS
Surface area
10,798 acres
HydroLAKES / HydroSHEDS
Shoreline
56.5 mi
HydroLAKES / HydroSHEDS
Elevation
207 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
- Nautical Boat Club - MontgomeryPublic
- Road 830Public
- Road 204Public
- Sam Houston National Forest - Scott’s RidgePublic
- Lakeview MarinaSemi-private
- Piney Shores BoatSemi-private
Showing 6 of 28 documented landings from the USGS National Boat Ramps inventory.
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Lake Conroe
Compare lakeside cabins, hotels, and vacation rentals near Lake Conroe in Montgomery 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 Lake Conroe are listed below.
Top-rated places to stay near Lake Conroe
Prices for Oct 23–25, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip? Cabins and lodging at Lake Conroe → · more Texas lake trips
Follow Lake Conroe’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Lake Conroe
Water Quality Trend: Improving
Based on 4 years of monitoring (2020–2023).
Water clarity
Improving4 years
Phosphorus
Stable+0.36 µg/L/yr3 years
Nearby Lakes in Montgomery County
Frequently asked questions about Lake Conroe
Where is Lake Conroe?
- Lake Conroe is a lake in Montgomery County, Texas. Its water-quality measurements are published by TCEQ and shown on this page as reported.
What is the water quality of Lake Conroe?
- Lake Conroe in Montgomery County, Texas has water-quality measurements published by TCEQ, shown here as reported. Water clarity: 2.2 ft visibility. Phosphorus: 70 µg/L.
Is Lake Conroe safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Lake Conroe?
- No published bathymetric survey covers Lake Conroe, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 47 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 Lake Conroe?
- Lake Conroe has 28 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Nautical Boat Club - Montgomery, Road 830, Road 204, Sam Houston National Forest - Scott’s Ridge, among others. Public access is listed as yes.
Can I fish at Lake Conroe?
- Lake Conroe has 28 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 Lake Conroe across LakeQuality
Depth, room, public access, and the state wake-sport rules
Species activity outlook by water temperature and season
Where to stay at Texas's top lakes, each with its readings
Texas's cleanest lakes, ranked on agency measurements
More lakes in Texas
Other Lakes in Texas
Eutrophic Lakes in Texas
Where this data comes from
110 measurements from 7 monitoring stations, 2020–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- USGS Texas Water Science Center
USGS-TX110 samples · 2020–2023
Monitoring station identifiers (7)
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