Green Mountain Reservoir water level
Reservoir, Colorado, United States
Right now
Very low for mid-October
Surface elevation
- Water stored
- 15,291 acre‑ft
History
202120222023202420252026
What this means
Water is short at Green Mountain Reservoir: the latest reading of 7,827.01 ft is far below normal for mid-October.
That puts it 89.40 ft below the median of 7,916.41 ft for mid-October, based on 36 years of readings. A year ago it stood at 7,899.70 ft (−72.69 ft).
It is still going down, by 1.86 ft over the past week. With the water still dropping, the shoreline keeps moving out. The 30-day range is 7,827.01 ft – 7,833.76 ft.
Many reservoirs are drawn down through summer and fall; most of the refill comes later, with winter rain or spring snowmelt.
Compared with 36 years of daily readings for this time of year. How to read levels
Key numbers
- Median for this date
- 7,916.41 ft89.40 ft below the median for this date
- Normal for this date
- 7,897.68 ft – 7,937.39 ft8 years in 10 fall in this range (36 years of records)
- Same day last year
- 7,899.70 ft−72.69 ft
- Lowest and highest in 30 days
- 7,827.01 ft – 7,833.76 ft
- Lowest and highest in 12 months
- 7,827.30 ft – 7,899.41 ft
Boating and fishing at Green Mountain Reservoir
At low levels, launching can mean a long walk or a closed ramp, and shallow points stick out further than charts suggest.
Conditions at the shore change with the level, so check with the agency that runs the lake before a trip.
Weather at the gauge
No rain in the last 3 days.
Forecast: Open-Meteo
Map
Nearby gauges
| Gauge | Level | Compared with normal | 24 hours | Distance |
|---|---|---|---|---|
| Blue River below Green Mountain ReservoirRiver gauge, Blue River | 3.44 ft | Below flood stage | +0.01 ft | 1.1 mi |
| Williams Fork near ParshallRiver gauge, Williams Fork | 6.0 cfs | Very low | −0.3 cfs | 11 mi |
| Williams Fork below Williams Fork ReservoirRiver gauge, Williams Fork | 1.47 ft | Below flood stage | ±0 | 12 mi |
| Colorado River near KremmlingRiver gauge, Colorado River | 3.99 ft | Below flood stage | −0.01 ft | 13 mi |
| Williams Fork near LealRiver gauge, Williams Fork | 1.43 ft | Below flood stage | +0.01 ft | 14 mi |
| Piney River near State BridgeRiver gauge, Piney River | 2.62 ft | Below flood stage | ±0 | 15 mi |
| Booth Creek near MinturnRiver gauge, Booth Creek | 0.9 cfs | Low | −0.2 cfs | 16 mi |
| South Fork of Williams Fork near LealRiver gauge, South Fork of Williams Fork | 6.2 cfs | Very low | ±0 | 16 mi |
Questions and answers
How does Green Mountain Reservoir compare with last year?
It is 72.69 ft lower than on the same day last year, when the reading was 7,899.70 ft.
What is a normal level for Green Mountain Reservoir in mid-October?
The median for mid-October is 7,916.41 ft. In 8 years out of 10 the reading falls between 7,897.68 ft and 7,937.39 ft, based on 36 years of records.
Is Green Mountain Reservoir really 7,827.01 ft deep?
No. 7,827.01 ft is the height of the water surface above sea level (or the agency's vertical datum), not the depth of the water.
What is the water level of Green Mountain Reservoir today?
On Oct 17, 2026, the surface elevation was 7,827.01 ft. Down 1.86 ft over the last 7 days.
Is Green Mountain Reservoir rising or falling?
Down 1.86 ft over the last 7 days.
Is the level of Green Mountain Reservoir normal?
Very low for mid-October. Compared with 36 years of daily readings for this time of year.
How often is this data updated?
The U.S. Bureau of Reclamation publishes a new reading once a day. This page refreshes within minutes of each update.
For specialists
Station codes, datum, parameters, data quality and downloads
- Operator
- U.S. Bureau of Reclamation
- Station code
usbr:353(Agency page)- Coordinates
39.87890, -106.31330(WGS84)- Update interval
- once a day
- Licence
- Public domain. Data: U.S. Bureau of Reclamation (RISE), provisional data subject to revision
Published series
| Parameter | Last value | Time (UTC) | Quality |
|---|---|---|---|
| Surface elevation | 7,827.01 ft | 2026-10-17 06:00 | Provisional |
| Water stored | 15,291 acre‑ft | 2026-10-17 06:00 | Provisional |
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How to cite
U.S. Bureau of Reclamation: Green Mountain Reservoir (usbr:353). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/united-states/colorado/green-mountain-reservoir
How we check values
Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.
Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer