Gray Reef Reservoir Water Level
Wyoming · updated daily from the U.S. Bureau of Reclamation
5330.94 ft
Gray Reef Reservoir is above average for this time of year and rising (+0.59 ft in the last 7 days).
Change since yesterday: +0.76 ft
Reading as of 2026-08-13 · higher than 69% of August readings on record
Where Gray Reef Reservoir sits historically
Today's level compared with every reading in our 5.5-year record for this lake.
Since yesterday
+0.76 ft
7-day change
+0.59 ft
30-day change
+0.50 ft
1-year change
+0.08 ft
Last 30 days
Last 12 months
Full history (5.5 years)
Gray Reef Reservoir records and averages
| Current level | 5330.94 ft |
|---|---|
| Record high | 5332.29 ft (2023-03-27) |
| Record low | 5315.43 ft (2026-03-02) |
| Average of all readings | 5330.38 ft |
| Data span | 5.5 years (2,000 readings) |
Frequently asked questions
Is Gray Reef Reservoir full right now?
As of 2026-08-13, Gray Reef Reservoir sits at 5330.94 ft, which is above average for this time of year.Over the past 30 days the level has risen 0.50 ft.
What is the water level at Gray Reef Reservoir today?
The most recent reading is 5330.94 ft (2026-08-13), sourced from the U.S. Bureau of Reclamation. Readings on this page refresh automatically as the agency publishes new data.
What is the highest Gray Reef Reservoir has ever been?
The highest level in our records is 5332.29 ft on 2023-03-27. The lowest is 5315.43 ft on 2026-03-02. Our record covers about 5.5 years of readings.
Is Gray Reef Reservoir low for this time of year?
Compared with every August in our records, the current level is higher than 69% of them — above average for this time of year. Seasonal comparison matters more than the raw number, because most reservoirs draw down predictably through late summer and refill over winter and spring.
Why is Gray Reef Reservoir changing right now?
Reservoir levels move for four main reasons: rainfall and runoff into the basin, releases through the dam for downstream water supply, power generation or flood control, evaporation during hot months, and seasonal drawdown schedules set by the operating agency. Gray Reef Reservoir has risen 0.50 ft over the past 30 days. For the operational reason on any given week, check the U.S. Bureau of Reclamation directly.
How much has Gray Reef Reservoir changed over the past year?
The level is +0.08 ft compared with this date last year (5330.94 ft today). The full-history chart above covers 5.5 years, with a record high of 5332.29 ft and a record low of 5315.43 ft.
Nearby lakes in Wyoming
Source: the U.S. Bureau of Reclamation. Readings are provisional and subject to revision by the publishing agency. All Wyoming lake levels.