Marys Lake water level

Name: Marys Lake water level (U.S. Bureau of Reclamation)
Creator: U.S. Bureau of Reclamation
License: https://www.usbr.gov/main/disclaim.html

Lake, Colorado, United States

Directions

Very low for mid-October

Surface elevation

8,026.37ft Down 6.75 ft over the last 7 days

Measured Oct 17, 2026 (2 days ago)

Water stored: 424 acre‑ft

History

What this means

Water is short at Marys Lake: the latest reading of 8,026.37 ft is far below normal for mid-October.

The median for mid-October is 8,032.65 ft, based on 31 years of readings, so the lake level is 6.28 ft below typical. On the same day last year the reading was 8,033.51 ft, a difference of −7.14 ft.

It is still going down, by 6.75 ft over the past week. With the water still dropping, the shoreline keeps moving out. The 30-day range is 8,025.63 ft – 8,038.68 ft.

Lakes and reservoirs often sit lower in fall after a summer of evaporation and use, and recover with winter rain and spring snowmelt.

Compared with 31 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 8,032.65 ft6.28 ft below the median for this date
Normal for this date: 8,028.28 ft – 8,037.07 ft8 years in 10 fall in this range (31 years of records)
Same day last year: 8,033.51 ft−7.14 ft
Lowest and highest in 30 days: 8,025.63 ft – 8,038.68 ft
Lowest and highest in 12 months: 8,021.57 ft – 8,038.68 ft

Boating and fishing at Marys Lake

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

Rain in the last 3 days: 0.30 in.

17 Sat 67° 39° – Wind 15 mph

18 Sun 64° 44° – Wind 13 mph

19 Mon 60° 38° – Wind 13 mph

20 Tue 60° 42° – Wind 8 mph

21 Wed 65° 43° – Wind 9 mph

22 Thu 62° 48° – Wind 7 mph

23 Fri 62° 38° 0.17 in, 51% Wind 10 mph

Forecast: Open-Meteo

Sunrise 07:17 AM Sunset 06:19 PM Daylight 11 hr, 2 min First quarter 52%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Big Thompson below Moraine Park near Estes ParkRiver gauge, Big Thompson	10.2 cfs	Normal	−0.5 cfs	2.7 mi
Lake Estes and OlympusLake	7,471.29 ft	Normal		3.2 mi
The Loch Outlet - Loch ValeRiver gauge	1.7 cfs	Normal	−0.2 cfs	7 mi
Andrews Creek-Loch Vale-RmnpRiver gauge	0.8 cfs	Normal	±0	8 mi
Pinewood Reservoir and RattlesnakeReservoir	6,561.57 ft	Low		13 mi
Flatiron ReservoirReservoir	5,467.74 ft	Normal		16 mi
Grand LakeLake	8,366.61 ft	High		16 mi
Colorado River below Baker Gulch near Grand LakeRiver gauge, Colorado River	4.09 ft	Below flood stage	±0	17 mi

Questions and answers

Is Marys Lake higher than last year?

No, it is 7.14 ft lower than on the same day last year, when the reading was 8,033.51 ft.

What is a normal level for Marys Lake in mid-October?

The median for mid-October is 8,032.65 ft. In 8 years out of 10 the reading falls between 8,028.28 ft and 8,037.07 ft, based on 31 years of records.

Is Marys Lake really 8,026.37 ft deep?

No. 8,026.37 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 Marys Lake today?

On Oct 17, 2026, the surface elevation was 8,026.37 ft. Down 6.75 ft over the last 7 days.

Is Marys Lake rising or falling?

Down 6.75 ft over the last 7 days.

Is the level of Marys Lake normal?

Very low for mid-October. Compared with 31 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:1 (Agency page)
Coordinates: 40.34408, -105.53431 (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	8,026.37 ft	2026-10-17 06:00	Provisional
Water stored	424 acre‑ft	2026-10-17 06:00	Provisional

Download

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<iframe src="https://nivelmap.com/embed/19249?lang=en" width="360" height="230" style="border:0;max-width:100%" loading="lazy" title="Marys Lake water level"></iframe>

How to cite

U.S. Bureau of Reclamation: Marys Lake (usbr:1). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/united-states/colorado/marys-lake

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