John Martin Reservoir Water Level
Colorado · updated daily from the U.S. Geological Survey
3802.23 ft
John Martin Reservoir is current reading available and steady (-0.15 ft in the last 7 days).
Change since yesterday: +0.00 ft
Reading as of 2026-08-15
Where John Martin Reservoir sits historically
Today's level compared with every reading in our 0.3-year record for this lake.
Since yesterday
+0.00 ft
7-day change
-0.15 ft
30-day change
-1.30 ft
1-year change
— ft
Last 30 days
Last 12 months
John Martin Reservoir records and averages
| Current level | 3802.23 ft |
|---|---|
| Record high | 3812.59 ft (2026-04-17) |
| Record low | 3802.21 ft (2026-08-13) |
| Average of all readings | 3805.73 ft |
| Data span | 0.3 years (121 readings) |
Frequently asked questions
Is John Martin Reservoir full right now?
As of 2026-08-15, John Martin Reservoir sits at 3802.23 ft, which is current reading available.Over the past 30 days the level has fallen 1.30 ft.
What is the water level at John Martin Reservoir today?
The most recent reading is 3802.23 ft (2026-08-15), sourced from the U.S. Geological Survey. Readings on this page refresh automatically as the agency publishes new data.
What is the highest John Martin Reservoir has ever been?
The highest level in our records is 3812.59 ft on 2026-04-17. The lowest is 3802.21 ft on 2026-08-13. Our record covers about 0.3 years of readings.
Why is John Martin 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. John Martin Reservoir has fallen 1.30 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.
How much has John Martin Reservoir changed over the past year?
Year-over-year comparison is not available for this lake yet. The full-history chart above covers 0.3 years, with a record high of 3812.59 ft and a record low of 3802.21 ft.
Nearby lakes in Colorado
Source: the U.S. Geological Survey. Readings are provisional and subject to revision by the publishing agency. All Colorado lake levels.