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Marys Lake water level

Lake, Colorado, United States

Directions

Very low for mid-October

Surface elevation

8,025.63ft Down 7.11 ft over the last 7 days

Water stored
402 acre‑ft
8,025 8,030 8,035

History

8,0258,0308,035ftOct 12Oct 13Oct 14Oct 15Oct 168,0258,0308,035ftOct 12Oct 14Oct 16
8,0258,0308,035ftSep 19Sep 25Oct 2Oct 9Oct 168,0258,0308,035ftSep 19Oct 2Oct 16
8,0258,0308,0358,040ftOct 2025Jan 2026Apr 2026Jul 2026Oct 20268,0258,0308,0358,040ftOct 2025Apr 2026Oct 2026
8,0008,0208,040ftOct 2016Apr 2019Oct 2021Apr 2024Oct 20268,0008,0208,040ftOct 2016Oct 2021Oct 2026
8,0008,0208,040ftJanMarMayJulSepNov20268,0008,0208,040ftJanAprJulOct2026

202120222023202420252026

Surface elevation Normal range (10–90 %)

What this means

Water is short at Marys Lake: the latest reading of 8,025.63 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 7.02 ft below typical. On the same day last year the reading was 8,033.51 ft, a difference of −7.88 ft.

It is still going down, by 7.11 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 ft7.02 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−7.88 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: 0.26 in.

17 Sat 67° 39° – Wind 15 mph
18 Sun 65° 43° – Wind 11 mph
19 Mon 57° 40° – Wind 8 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° 37° 0.17 in, 59% Wind 10 mph

Forecast: Open-Meteo

Sunrise 07:17 AM Sunset 06:19 PM Daylight 11 hr, 2 min First quarter 46%

Map

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Big Thompson below Moraine Park near Estes ParkRiver gauge, Big Thompson 10.7 cfs Normal −1.4 cfs 2.7 mi
Lake Estes and OlympusLake 7,473.34 ft Very high 3.2 mi
The Loch Outlet - Loch ValeRiver gauge 1.8 cfs Normal −0.2 cfs 7 mi
Andrews Creek-Loch Vale-RmnpRiver gauge 0.8 cfs Normal ±0 8 mi
Pinewood Reservoir and RattlesnakeReservoir 6,563.11 ft Low 13 mi
Flatiron ReservoirReservoir 5,470.64 ft Very high 16 mi
Grand LakeLake 8,366.55 ft Normal 16 mi
Colorado River below Baker Gulch near Grand LakeRiver gauge, Colorado River 4.11 ft Below flood stage +0.02 ft 17 mi

Questions and answers

Is Marys Lake higher than last year?

No, it is 7.88 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 8,025.63 ft deep?

No. 8,025.63 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 16, 2026, the surface elevation was 8,025.63 ft. Down 7.11 ft over the last 7 days.

Is Marys Lake rising or falling?

Down 7.11 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

ParameterLast valueTime (UTC)Quality
Surface elevation 8,025.63 ft 2026-10-16 06:00 Provisional
Water stored 402 acre‑ft 2026-10-16 06:00 Provisional

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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