John Martin Reservoir water level: John Martin 
44.2 ft low
John Martin Reservoir is 44.2 ft below full pool, about normal for early November. The John Martin Dam gauge read 3,807.61 ft at 6:15 AM MST, November 4, 2026.
How John Martin stands today
In early November John Martin normally sits near 3,806.47 ft, 45.4 ft under full pool, so most of today's gap is the usual seasonal drawdown.
- 3,807.61 Feet above sea level6:15 AM MST, November 4, 2026, NGVD29 datum.
- −44.23 Feet from full poolFull pool today is 3,851.84 ft.
- 10.7 Percent of conservation storageWater held above bottom of normal, as a share of the pool's capacity.
- +1.14 Feet from normal for Nov 4Median of 2015–2025 is 3,806.47 ft. Today ranks in the 55th percentile.
- +7.26 Feet from a year ago3,800.35 ft on November 4, 2025.
- +3.03 Feet over 30 days+1.09 ft over the past 7 days.
The past year, day by day
The shaded band is where John Martin usually sits on each date: the middle 80% of years from 2015 to 2025. The blue line is the past 12 months; the sand line is the 12 months before. Hover or use the arrow keys to read any day.
- Past 12 months
- The 12 months before
- Normal range (middle 80% of years)
- Median
- Full pool
Monthly average since 2014
Readings for the last 30 days
| Date | Level (ft) | Normal (ft) |
|---|---|---|
| November 4, 2026 | 3,807.60 | 3,806.47 |
| November 3, 2026 | 3,807.56 | 3,806.46 |
| November 2, 2026 | 3,807.42 | 3,806.45 |
| November 1, 2026 | 3,807.27 | 3,806.45 |
| October 31, 2026 | 3,807.16 | 3,806.45 |
| October 30, 2026 | 3,807.04 | 3,806.45 |
| October 29, 2026 | 3,806.87 | 3,806.46 |
| October 28, 2026 | 3,806.52 | 3,806.47 |
| October 27, 2026 | 3,805.94 | 3,806.48 |
| October 26, 2026 | 3,805.89 | 3,806.49 |
| October 25, 2026 | 3,805.83 | 3,806.50 |
| October 24, 2026 | 3,805.69 | 3,806.51 |
| October 23, 2026 | 3,805.65 | 3,806.51 |
| October 22, 2026 | 3,805.64 | 3,806.51 |
| October 21, 2026 | 3,805.62 | 3,806.52 |
| Date | Level (ft) | Normal (ft) |
|---|---|---|
| October 20, 2026 | 3,805.61 | 3,806.53 |
| October 19, 2026 | 3,805.60 | 3,806.54 |
| October 18, 2026 | 3,805.62 | 3,806.54 |
| October 17, 2026 | 3,805.65 | 3,806.55 |
| October 16, 2026 | 3,805.69 | 3,806.56 |
| October 15, 2026 | 3,805.72 | 3,806.57 |
| October 14, 2026 | 3,805.73 | 3,806.59 |
| October 13, 2026 | 3,805.73 | 3,806.61 |
| October 12, 2026 | 3,805.75 | 3,806.63 |
| October 11, 2026 | 3,805.75 | 3,806.66 |
| October 10, 2026 | 3,805.74 | 3,806.69 |
| October 9, 2026 | 3,805.72 | 3,806.72 |
| October 8, 2026 | 3,805.67 | 3,806.75 |
| October 7, 2026 | 3,805.55 | 3,806.77 |
| October 6, 2026 | 3,805.42 | 3,806.79 |
Is the water above your dock?
Enter the elevation of your dock, ramp end or a mark on your shoreline, in feet above sea level (NGVD29, the datum the Army Corps of Engineers uses for this gauge). You will see how far the water is above or below it today, and how often it dipped below it in each month since 2016.
| Month | Low year (10th %) | Median | High year (90th %) | Days above your mark |
|---|---|---|---|---|
| January | 3,804.47 | 3,810.18 | 3,841.27 | — |
| February | 3,806.33 | 3,812.70 | 3,842.01 | — |
| March | 3,807.83 | 3,815.86 | 3,842.24 | — |
| April | 3,809.66 | 3,817.78 | 3,841.87 | — |
| May | 3,806.00 | 3,816.03 | 3,840.37 | — |
| June | 3,804.43 | 3,816.06 | 3,843.34 | — |
| July | 3,803.05 | 3,813.96 | 3,839.22 | — |
| August | 3,801.33 | 3,809.06 | 3,833.98 | — |
| September | 3,800.35 | 3,803.21 | 3,831.50 | — |
| October | 3,799.59 | 3,805.69 | 3,828.95 | — |
| November | 3,799.56 | 3,806.45 | 3,829.65 | — |
| December | 3,801.67 | 3,807.80 | 3,831.99 | — |
Other Colorado lakes, lowest first
| Lake | Level (ft) | Vs full pool |
|---|---|---|
 Blue Mesa Reservoir | 7,418.22 | 19.6% full |
| Lake Pueblo | 4,858.44 | 47.5% full |
 Cherry Creek Reservoir | 5,545.92 | 4.1 ft below |
 Lake Granby | 8,234.63 | 45.4 ft below |
| Trinidad Lake | 6,177.20 | 24.0% full |
 Navajo Lake | 6,050.39 | 67.1% full |
 Ridgway Reservoir | 6,851.09 | 76.4% full |
 Chatfield Reservoir | 5,431.67 | 12.3 ft below |
 Horsetooth Reservoir | 5,407.92 | 22.1 ft below |
| Vallecito Reservoir | 7,663.61 | 97.0% full |
 Lemon Reservoir | 8,140.46 | 88.5% full |
John Martin questions
What is full pool at John Martin Reservoir?
Full pool at John Martin Reservoir is 3,851.84 ft above sea level today. The agency's own term for it is “top of conservation.”
Is John Martin Reservoir full right now?
No. It is 44.2 ft below full pool and holds 10.7% of its conservation storage. In early November John Martin normally sits near 3,806.47 ft, 45.4 ft under full pool, so most of today's gap is the usual seasonal drawdown.
Is John Martin Reservoir lower than normal for early November?
No, it is close to normal. The median level on Nov 4 across 2015–2025 is 3,806.47 ft, and today's 3,807.61 ft is +1.14 ft from it. In 8 of 10 years the level on this date fell between 3,799.74 and 3,838.53 ft.
How does John Martin Reservoir compare with last year?
A year ago, on November 4, 2025, it stood at 3,800.35 ft. It is 7.26 ft higher now.
What are the highest and lowest levels since 2014?
In the daily record we hold, which starts in 2014, the highest daily level was 3,850.45 ft on July 14, 2015 and the lowest was 3,795.38 ft on November 7, 2014.
How often is this page updated?
We pull new readings from the U.S. Army Corps of Engineers several times a day. This page was last rebuilt on Wed, 04 Nov 2026 13:52:28 UTC. Readings are provisional and can be revised by the agency.