Lake Mcmurtry
Noble County, Oklahoma1,155 acresView mapDirections
Oklahoma DEQ publishes the water-quality measurements for Lake Mcmurtry. Here is what has been measured.
- Impaired · Mercury
- 40 ft max depth
- Public access
- Limited data
Ask about Lake Mcmurtry
Answers come straight from the public measurements and survey records on this page.
Lake Mcmurtry in Noble County, Oklahoma has water-quality measurements published by Oklahoma DEQ, shown here as reported. Water clarity: 3.2 ft visibility. Surface area: 1155 acres.
Stays via Stay22
Stays near Lake Mcmurtry
Compare lakeside cabins, hotels, and vacation rentals near Lake Mcmurtry in Noble County, Oklahoma — 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.
Top-rated places to stay near Lake Mcmurtry
Prices for Sep 18–20, 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 whole trip? See where to stay at Oklahoma’s top lakes →
Follow Lake Mcmurtry’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Lake Mcmurtry is a 1,155-acre lake in Noble County, Oklahoma with an estimated average depth of about 40 feet. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, ODEQ, last sampled 2023-09-20. Grade methodology: LakeQuality methodology.
What Lake Mcmurtry is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Big water1,155 acres
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Lake Mcmurtry is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, turbidity. Check local advisories before you swim.
Whether Lake Mcmurtry is safe to swim in today is a call for the Oklahoma Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake Mcmurtry
These are the measurements Oklahoma DEQ publishes for Lake Mcmurtry, 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 3.2 ft of visibility. TSI 60.
| Metric | Value | EPA condition class |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.2 ft | Measured, not scored |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 60 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~40 ft est. |
| Average Depth | ~25 ft est. |
| Surface Area | 1,155 acres |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Oklahoma has not published bathymetry for Lake Mcmurtry.
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.
Recreation & Access
- Lake McMurtry EastPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Mcmurtry
Water Quality Trend: ↓ Declining
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -2.893 m/yr | 3 |
Reservoir Info (USACE NID)
Lake Mcmurtry is a man-made reservoir impounded by the SCS-Stillwater Creek Site-40 (completed 1971), built primarily for water supply on the North Stillwater Creek; earth-type dam, 64 ft tall and 3,039 ft long.
- Surface area
- 1,155 ac
- Normal storage
- 19,733 ac-ft
- Max storage
- 24,726 ac-ft
- Drainage area
- 25 sq mi
- Hazard class
- High
- Owner
- NOBLE CO CONS DIST
Source: USACE National Inventory of Dams, NID ID OK01429 · Operator website
EPA Impairment Status
Lake Mcmurtry is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit OK620900040240_00 · Official waterbody report
Nearby Lakes in Noble County
Frequently asked questions about Lake Mcmurtry
Where is Lake Mcmurtry?
- Lake Mcmurtry is a lake in Noble County, Oklahoma. Its water-quality measurements are published by Oklahoma DEQ and shown on this page as reported.
What is the water quality of Lake Mcmurtry?
- Lake Mcmurtry in Noble County, Oklahoma has water-quality measurements published by Oklahoma DEQ, shown here as reported. Water clarity: 3.2 ft visibility. Surface area: 1155 acres.
Is Lake Mcmurtry safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Mcmurtry is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, turbidity. Check local advisories before you swim.
How deep is Lake Mcmurtry?
- No published bathymetric survey covers Lake Mcmurtry, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 40 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 1155 acres.
Are there boat ramps on Lake Mcmurtry?
- Lake Mcmurtry has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake McMurtry East. Public access is listed as yes.
Explore Lake Mcmurtry across LakeQuality
More lakes in Oklahoma
Other Lakes in Oklahoma
Eutrophic Lakes in Oklahoma
Where this data comes from
26 measurements from 3 monitoring stations, 2016–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- OWRB Lakes Monitoring
OKWRB-LAKES_WQX26 samples · 2016–2023
Analytical methods
- OWRB Lakes Field Data Collection
- Determination of Turbidity
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
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory