Lak Reservoir
Weston County, Wyoming126 acresView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Public access
- Limited data
Lak Reservoir in Weston County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 22.4 ft visibility. Phosphorus: 10 µg/L. Surface area: 126 acres.
- Clarity
- 22.4 ft
- Area
- 126 acres
- Phosphorus
- 10 µg/L
- Public access
- Yes
Stays via Stay22
Stays near Lak Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Lak Reservoir in Weston 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 Lak Reservoir
Prices for Sep 11–13, 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 →
Watch Lak Reservoir’s letter
Email me if this lake’s grade moves. Grades stay free.
Or email
Why Lak Reservoir has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Lak Reservoir, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and phosphorus, but not algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by Wyoming DEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lak Reservoir is a 126-acre lake in Weston County, Wyoming. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2019-09-09. Grade methodology: LakeQuality methodology.
What Lak Reservoir is good for
From access and monitoring records, not editorial picks.
- Clear water22.4 ft of visibility
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Lak Reservoir
These readings exist but are not enough for an A–F grade — see why.
Crystal clear, you can see 22.4 ft down. Phosphorus 10 µg/L. TSI 35.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 22.4 ft | Not graded |
| Phosphorus | 10 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 35 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 126 acres |
| Public Access | Yes |
The available depth estimate for Lak Reservoir is shallower than its measured water clarity, which cannot be right, so no depth is shown.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fishing Lak Reservoir
Reservoir Info (USACE NID)
Lak Reservoir is a man-made reservoir impounded by the Spencer (completed 1952), built primarily for irrigation on the Stockade Beaver Creek; earth-type dam, 45 ft tall and 1,350 ft long.
- Surface area
- 126 ac
- Normal storage
- 2,162 ac-ft
- Max storage
- 2,847 ac-ft
- Drainage area
- 20.1 sq mi
- Hazard class
- Significant
- Owner
- TRUE RANCHES, INC. (RANDY FERELLA)
Source: USACE National Inventory of Dams, NID ID WY00717 · Operator website
Nearby Lakes in Weston County
Frequently asked questions about Lak Reservoir
Where is Lak Reservoir?
- Lak Reservoir is a lake in Weston County, Wyoming. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Lak Reservoir?
- Lak Reservoir in Weston County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 22.4 ft visibility. Phosphorus: 10 µg/L. Surface area: 126 acres.
Is Lak Reservoir safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Lak Reservoir?
- The available depth estimate for Lak Reservoir is shallower than its measured water clarity, which cannot be right, so no depth is shown. The lake covers 126 acres.
Explore Lak Reservoir across LakeQuality
Planning a trip around Wind Cave?
Lak Reservoir is about 37 miles from Wind Cave National Park. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Wind Cave →More Wyoming Lake Rankings
Other Lakes in Wyoming
Oligotrophic 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)
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
Lake size & watershed from HydroLAKES (HydroSHEDS)