John Martin Reservoir, CO

As of 2026-10-13, John Martin Reservoir sits at 3805.75 ft, which is above average for this time of year. That is 46.11 ft below full pool of 3851.86 ft. Over the past 30 days the level has risen 4.45 ft.

The most recent reading at John Martin Reservoir is 3805.75 ft (2026-10-13), sourced from the U.S. Army Corps of Engineers. Readings on this page refresh automatically as the agency publishes new data.

The highest level for John Martin Reservoir in our records is 3860.42 ft on 1999-05-10. The lowest is 3790.17 ft on 2006-08-13. Our record covers about 27 years of readings.

Compared with every October in our records, the current level is higher than 65% of them, which we classify as 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.

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 risen 4.45 ft over the past 30 days. For the operational reason on any given week, check the U.S. Army Corps of Engineers directly.

John Martin Reservoir is +5.39 ft compared with this date last year (3805.75 ft today). The full-history chart above covers 27 years, with a record high of 3860.42 ft and a record low of 3790.17 ft.