Rob Roy Reservoir
Albany County, Wyoming801 acresView mapDirections
Wyoming DEQ publishes the water-quality measurements for Rob Roy Reservoir. Here is what has been measured.
- Oligotrophic
- Public access
- Limited data
Rob Roy Reservoir in Albany County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Water clarity: 11.2 ft visibility. Phosphorus: 10 µg/L. Surface area: 801 acres.
Rob Roy Reservoir is a 801-acre cold, clear oligotrophic lake in Albany County, Wyoming. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 4 other monitored lakes in Albany County, Rob Roy Reservoir ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2018-09-05. Methodology: how these readings are compared.
Rob Roy Reservoir covers about 800 acres in Albany County. It has one public boat landing. If you are planning to stay, you can search lake houses and cabins around Rob Roy Reservoir on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.
What Rob Roy Reservoir is good for
From access and monitoring records, not editorial picks.
- Clear water11.2 ft of visibility
- Boat launch1 documented ramp
- 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 Rob Roy 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 Rob Roy Reservoir
These are the measurements Wyoming DEQ publishes for Rob Roy 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 11.2 ft. Phosphorus 10 µg/L. TSI 40.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 11.2ft | 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 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Rob Roy Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
801 acres
Public access
Yes
Listed by Wyoming DEQ
No bathymetric survey has been published for Rob Roy Reservoir, so its depth is not documented here.
Recreation & Access
- Rob Roy ReservoirPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Public campgrounds near Rob Roy Reservoir
- Rob Roy0.9 km
- Spruce Mtn Fire Lookout Tower3.2 kmReserve
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 Rob Roy Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Rob Roy Reservoir in Albany 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 Rob Roy 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 trip? Cabins and lodging at Rob Roy Reservoir → · more Wyoming lake trips
Follow Rob Roy Reservoir’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Rob Roy Reservoir
Water quality readings over time
2 seasons of samples on record (2012–2018). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Improving2 years
Phosphorus
Improving-3.33 µg/L/yr2 years
Reservoir Info (USACE NID)
Rob Roy Reservoir is a man-made reservoir impounded by the Rob Roy (completed 1986), built primarily for water supply on the Douglas Creek; earth-type dam, 150 ft tall and 1,095 ft long.
- Surface area
- 801 ac
- Normal storage
- 35,434 ac-ft
- Max storage
- 42,264 ac-ft
- Drainage area
- 20.8 sq mi
- Hazard class
- High
- Owner
- CHEYENNE BOARD OF PUBLIC UTILITIES
All listed purposes: Water Supply;Irrigation.
Source: USACE National Inventory of Dams, NID ID WY00084 · Operator website
Nearby Lakes in Albany County
Frequently asked questions about Rob Roy Reservoir
Where is Rob Roy Reservoir?
- Rob Roy Reservoir is a lake in Albany County, Wyoming. Its water-quality measurements are published by Wyoming DEQ and shown on this page as reported.
What is the water quality of Rob Roy Reservoir?
- Rob Roy Reservoir in Albany County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Water clarity: 11.2 ft visibility. Phosphorus: 10 µg/L. Surface area: 801 acres.
Is Rob Roy Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Rob Roy Reservoir?
- Rob Roy Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Rob Roy Reservoir. Public access is listed as yes.
Can I fish at Rob Roy Reservoir?
- Rob Roy Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Wyoming's fish and wildlife agency, so check its current regulations before you go.
Are there campgrounds on Rob Roy Reservoir?
- Rob Roy Reservoir has 2 public campgrounds from USGS The National Map within 5 km, including Rob Roy, Spruce Mtn Fire Lookout Tower. 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 Rob Roy Reservoir across LakeQuality
More lakes in Wyoming
Other Lakes in Wyoming
Oligotrophic Lakes in Wyoming
Where this data comes from
12 measurements from 2 monitoring stations, 2018. 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 · 2018
Analytical methods
- Secchi
- Total Phosphorus After Block Digestion
Monitoring station identifiers (2)
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
Named boat-access points from the USGS National Boat Ramps inventory
Public campgrounds from USGS The National Map Structures, within about 3 miles