Ocean Lake
Fremont County, WyomingView mapDirections
Clarity, phosphorus, and algae sit in the clean band for this region.
↑ up from C at the last regrade
- Eutrophic
- Impaired · Sediment / turbidity
- #2 of 18 in the county
- 77 ft max depth
- Public access
- Limited data
Ocean Lake in Fremont County, Wyoming has a water quality grade of B (Good). Water clarity: 2.2 ft visibility. Phosphorus: 25 µg/L.
- Clarity
- 2.2 ft
- Max depth
- ~77 ft est.
- Type
- Eutrophic
- Phosphorus
- 25 µg/L
- Public access
- Yes
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Ocean Lake is a productive, nutrient-rich eutrophic lake in Fremont County, Wyoming with an estimated average depth of about 77 feet. Water quality is graded B based on 1 sampling years through 2019. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 17 other monitored lakes in Fremont County, Ocean Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2019-09-12. Grade methodology: LakeQuality methodology.
What Ocean Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
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 B is nutrients and algae, not a swimming clearance. Ocean Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for sediment / turbidity. Check local advisories before you swim.
Water Quality Grade: B (Good)
Very murky, less than 2.2 ft of visibility. Phosphorus 25 µg/L. TSI 58. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.2 ft | Not graded |
| Phosphorus | 25 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 58 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~77 ft est. |
| Average Depth | ~8 ft est. |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Wyoming has not published bathymetry for Ocean Lake.
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
- Ocean LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Ocean Lake
EPA Impairment Status
Ocean Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit WYBH100800050202_01 · Official waterbody report
County Ranking
Ranked #2 of 18 lakes in Fremont County
Nearby Lakes in Fremont County
Frequently asked questions about Ocean Lake
Where is Ocean Lake?
- Ocean Lake is a lake in Fremont County, Wyoming. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Ocean Lake?
- Ocean Lake in Fremont County, Wyoming has a water quality grade of B (Good). Water clarity: 2.2 ft visibility. Phosphorus: 25 µg/L.
Is Ocean Lake safe to swim in?
- The B is nutrients and algae, not a swimming clearance. Ocean Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for sediment / turbidity. Check local advisories before you swim.
How deep is Ocean Lake?
- No published bathymetric survey covers Ocean Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 77 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 Ocean Lake?
- Ocean Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Ocean Lake. Public access is listed as yes.
Explore Ocean Lake across LakeQuality
17.1 mi away · recorded at 111°F
Species activity outlook by water temperature and season
Where to stay at Wyoming's top lakes, each with its grade
High nutrients, frequent algae, reduced clarity
Wyoming's cleanest and most-polluted lakes, ranked
More Wyoming Lake Rankings
Other Grade B Lakes in Wyoming
Eutrophic Lakes in Wyoming
Where this data comes from
12 measurements from 2 monitoring stations, 2019. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- State of Wyoming Department of Environmental Quality Watershed Program
WYDEQ_WATERSHED12 samples · 2019
Analytical methods
- Secchi
- Total Phosphorus After Block Digestion
Monitoring station identifiers (2)
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
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