Park Reservoir
Sheridan County, Wyoming318 acresView mapDirections
Wyoming DEQ publishes the water-quality measurements for Park Reservoir. Here is what has been measured.
- Mesotrophic
- 19 ft max depth
- Limited data
Park Reservoir in Sheridan County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Water clarity: 10.8 ft visibility. Phosphorus: 10 µg/L. Surface area: 318 acres.
Park Reservoir is a 318-acre mesotrophic lake in Sheridan County, Wyoming with an estimated average depth of about 19 feet. Compared to the 4 other monitored lakes in Sheridan County, Park Reservoir ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2019-09-10. Methodology: how these readings are compared.
Park Reservoir covers about 320 acres in Sheridan County. Vrbo is where to look for cabins and lake homes around Park Reservoir, and Booking.com and Expedia search hotels near the lake for your dates.
What Park Reservoir is good for
From access and monitoring records, not editorial picks.
- Clear water10.8 ft of visibility
- Camping2 public campgrounds nearby
Swimming conditions
Readings onlyLimited data
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 Park Reservoir is safe to swim in today is a call for the Wyoming Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Park Reservoir
These are the measurements Wyoming DEQ publishes for Park Reservoir, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 10.8 ft. Phosphorus 10 µg/L. TSI 40.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 10.8ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 10µg/L | Good 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. | 40 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Park Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~19 ft est.
Surface area
318 acres
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Wyoming has not published bathymetry for Park Reservoir.
Lake Size & Watershed
Watershed (drainage) area
39 sq mi
HydroLAKES / HydroSHEDS
Shoreline
3.7 mi
HydroLAKES / HydroSHEDS
Elevation
8,251 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
Public campgrounds near Park Reservoir
- East Fork3.0 km
- Ranger Creek3.6 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
Stays via Stay22
Stays near Park Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Park Reservoir in Sheridan County, Wyoming — 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 Park Reservoir
Prices for Oct 30–Nov 1, 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 Wyoming’s top lakes →
Follow Park Reservoir’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Park Reservoir
Reservoir Info (USACE NID)
Park Reservoir is a man-made reservoir impounded by the Big Goose Park (3rd Enl.) (completed 1958), built primarily for irrigation on the East Fork Big Goose Creek; earth-type dam, 95 ft tall and 1,280 ft long.
- Surface area
- 318 ac
- Normal storage
- 10,362 ac-ft
- Max storage
- 12,500 ac-ft
- Drainage area
- 27.3 sq mi
- Hazard class
- High
- Owner
- PARK RESERVOIR COMPANY
Source: USACE National Inventory of Dams, NID ID WY01342 · Operator website
Nearby Lakes in Sheridan County
Frequently asked questions about Park Reservoir
Where is Park Reservoir?
- Park Reservoir is a lake in Sheridan County, Wyoming. Its water-quality measurements are published by Wyoming DEQ and shown on this page as reported.
What is the water quality of Park Reservoir?
- Park Reservoir in Sheridan County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Water clarity: 10.8 ft visibility. Phosphorus: 10 µg/L. Surface area: 318 acres.
Is Park Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Park Reservoir?
- No published bathymetric survey covers Park Reservoir, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 19 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 318 acres.
Are there campgrounds on Park Reservoir?
- Park Reservoir has 2 public campgrounds from USGS The National Map within 5 km, including East Fork, Ranger Creek. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
Explore Park Reservoir across LakeQuality
More lakes in Wyoming
Other Lakes in Wyoming
Mesotrophic Lakes in Wyoming
Where this data comes from
6 measurements from 1 monitoring station, 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_WATERSHED6 samples · 2019
Analytical methods
- Secchi
- Total Phosphorus After Block Digestion
Monitoring station identifiers (1)
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)
Public campgrounds from USGS The National Map Structures, within about 3 miles