Glendo Reservoir Lacustrine Pelagic
Platte County, Wyoming23,320 acresView mapDirections
Clarity, phosphorus, and algae sit in the clean band for this region.
↑ up from C at the last regrade
- Eutrophic
- #2 of 9 in the county
- Public access
- Limited data
Glendo Reservoir Lacustrine Pelagic in Platte County, Wyoming has a water quality grade of B (Good). Water clarity: 5.2 ft visibility. Phosphorus: 20 µg/L. Surface area: 23320 acres.
- Clarity
- 5.2 ft
- Area
- 23,320 acres
- Type
- Eutrophic
- Phosphorus
- 20 µg/L
- Trend
- ↓ Declining
- Public access
- Yes
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Watch Glendo Reservoir Lacustrine Pelagic’s letter
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Glendo Reservoir Lacustrine Pelagic is a 23,320-acre productive, nutrient-rich eutrophic lake in Platte County, Wyoming. Water quality is graded B based on 1 sampling years through 2018. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 2 public boat landings. Compared to the 8 other monitored lakes in Platte County, Glendo Reservoir Lacustrine Pelagic ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2018-09-05. Grade methodology: LakeQuality methodology.
What Glendo Reservoir Lacustrine Pelagic is good for
From access and monitoring records, not editorial picks.
- Boat launch2 documented ramps
- Big water23,320 acres
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. Check local advisories before you swim.
Water Quality Grade: B (Good)
Murky, only visible to about 5.2 ft. Phosphorus 20 µg/L. TSI 50. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.2 ft | Not graded |
| Phosphorus | 20 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 50 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 23,320 acres |
| Public Access | Yes |
No bathymetric survey has been published for Glendo Reservoir Lacustrine Pelagic, so its depth is not documented here.
Recreation & Access
- Glendo State Park - 1Public
- Glendo State Park - 2Public
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Glendo Reservoir Lacustrine Pelagic
Water Quality Trend: ↓ Declining
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.088 m/yr | 2 |
| Phosphorus | → Stable | 0 µg/L/yr | 3 |
Reservoir Info (USACE NID)
Glendo Reservoir Lacustrine Pelagic is a man-made reservoir impounded by the Glendo Dam (completed 1958), built primarily for flood risk reduction on the North Platte River; earth-type dam, 196 ft tall and 2,096 ft long.
- Surface area
- 23,320 ac
- Normal storage
- 454,337 ac-ft
- Max storage
- 1,118,653 ac-ft
- Drainage area
- 15,545 sq mi
- Hazard class
- High
- Owner
- BUREAU OF RECLAMATION
All listed purposes: Flood Risk Reduction;Irrigation;Fish and Wildlife Pond;Recreation;Hydroelectric.
Source: USACE National Inventory of Dams, NID ID WY01291 · Operator website · Matched by proximity (0.56 km)
County Ranking
Ranked #2 of 9 lakes in Platte County
Nearby Lakes in Platte County
Frequently asked questions about Glendo Reservoir Lacustrine Pelagic
Where is Glendo Reservoir Lacustrine Pelagic?
- Glendo Reservoir Lacustrine Pelagic is a lake in Platte County, Wyoming. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Glendo Reservoir Lacustrine Pelagic?
- Glendo Reservoir Lacustrine Pelagic in Platte County, Wyoming has a water quality grade of B (Good). Water clarity: 5.2 ft visibility. Phosphorus: 20 µg/L. Surface area: 23320 acres.
Is Glendo Reservoir Lacustrine Pelagic safe to swim in?
- The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Glendo Reservoir Lacustrine Pelagic?
- Glendo Reservoir Lacustrine Pelagic has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Glendo State Park - 1, Glendo State Park - 2. Public access is listed as yes.
Explore Glendo Reservoir Lacustrine Pelagic across LakeQuality
More Wyoming Lake Rankings
Other Grade B Lakes in Wyoming
Eutrophic Lakes in Wyoming
Where this data comes from
11 measurements from 1 monitoring station, 2012–2018. 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_WATERSHED11 samples · 2012–2018
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
Named boat-access points from the USGS National Boat Ramps inventory