Flatiron Reservoir water level
Reservoir, Colorado, United States
Right now
Very high for mid-October
Surface elevation
- Water stored
- 635 acre‑ft
History
202120222023202420252026
What this means
At 5,470.64 ft, Flatiron Reservoir is holding more water than usual for mid-October.
That puts it 1.98 ft above the median of 5,468.66 ft for mid-October, based on 24 years of readings. A year ago it stood at 5,465.79 ft (+4.85 ft).
It is on the way up, by 0.07 ft over the past week. The 30-day range is 5,467.88 ft – 5,471.34 ft.
Many reservoirs are drawn down through summer and fall; most of the refill comes later, with winter rain or spring snowmelt.
Compared with 24 years of daily readings for this time of year. How to read levels
Key numbers
- Median for this date
- 5,468.66 ft1.98 ft above the median for this date
- Normal for this date
- 5,465.96 ft – 5,470.51 ft8 years in 10 fall in this range (24 years of records)
- Same day last year
- 5,465.79 ft+4.85 ft
- Lowest and highest in 30 days
- 5,467.88 ft – 5,471.34 ft
- Lowest and highest in 12 months
- 5,463.98 ft – 5,471.79 ft
Boating and fishing at Flatiron Reservoir
When a lake runs high, docks and swimming areas may close for a while and floating logs become a real hazard for boats.
Conditions at the shore change with the level, so check with the agency that runs the lake before a trip.
Weather at the gauge
The forecast is not available right now.
Map
Nearby gauges
| Gauge | Level | Compared with normal | 24 hours | Distance |
|---|---|---|---|---|
| Pinewood Reservoir and RattlesnakeReservoir | 6,563.11 ft | Low | 2.7 mi | |
| Carter Lake ReservoirReservoir | 5,709.77 ft | Normal | 3.1 mi | |
| Big Thompson River at LovelandRiver gauge, Big Thompson River | 0.91 ft | Below flood stage | +0.11 ft | 9 mi |
| Lake Estes and OlympusLake | 7,473.34 ft | Very high | 13 mi | |
| Marys LakeLake | 8,025.63 ft | Very low | 16 mi | |
| Horsetooth ReservoirReservoir | 5,411.91 ft | Very high | 17 mi | |
| Left Hand Creek at Hover Road near LongmontRiver gauge, Left Hand Creek | 0.9 cfs | Very low | +0.1 cfs | 17 mi |
| Cache La Poudre River above Boxelder Creek near TimnathRiver gauge, Cache La Poudre River | 19.9 cfs | Normal | +13.5 cfs | 18 mi |
Questions and answers
How does Flatiron Reservoir compare with last year?
It is 4.85 ft higher than on the same day last year, when the reading was 5,465.79 ft.
What is a normal level for Flatiron Reservoir in mid-October?
The median for mid-October is 5,468.66 ft. In 8 years out of 10 the reading falls between 5,465.96 ft and 5,470.51 ft, based on 24 years of records.
Is Flatiron Reservoir really 5,470.64 ft deep?
No. 5,470.64 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 Flatiron Reservoir today?
On Oct 16, 2026, the surface elevation was 5,470.64 ft. Up 0.07 ft over the last 7 days.
Is Flatiron Reservoir rising or falling?
Up 0.07 ft over the last 7 days.
Is the level of Flatiron Reservoir normal?
Very high for mid-October. Compared with 24 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:331(Agency page)- Coordinates
40.36500, -105.23610(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 | 5,470.64 ft | 2026-10-16 06:00 | Provisional |
| Water stored | 635 acre‑ft | 2026-10-16 06:00 | Provisional |
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How to cite
U.S. Bureau of Reclamation: Flatiron Reservoir (usbr:331). Accessed October 17, 2026 via Nivelmap, https://nivelmap.com/en/united-states/colorado/flatiron-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