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Willow Creek Reservoir water level

Reservoir, Montana, United States

Directions

Right now

Normal for mid-October

Surface elevation

4,129.27ft Up 0.98 ft over the last 7 days

Water stored
15,978 acre‑ft
4,120 4,130 4,140

History

History
4,1204,1304,140ftOct 13Oct 14Oct 15Oct 16Oct 184,1204,1304,140ftOct 13Oct 15Oct 18
4,1204,1304,140ftSep 20Sep 27Oct 4Oct 11Oct 184,1204,1304,140ftSep 20Oct 4Oct 18
4,1204,1304,140ftOct 2025Jan 2026Apr 2026Jul 2026Oct 20264,1204,1304,140ftOct 2025Apr 2026Oct 2026
4,1004,1204,140ftOct 2016Apr 2019Oct 2021Apr 2024Oct 20264,1004,1204,140ftOct 2016Oct 2021Oct 2026
4,1204,1304,140ftJanMarMayJulSepNov20264,1204,1304,140ftJanAprJulOct2026

202120222023202420252026

Surface elevation Normal range (10–90 %)

What this means

The lake level at Willow Creek Reservoir reads 4,129.27 ft, about where it usually sits at this time of year.

The median for mid-October is 4,133.57 ft, based on 36 years of readings, so the lake level is 4.30 ft below typical. On the same day last year the reading was 4,112.86 ft, a difference of +16.41 ft.

It is on the way up, by 0.98 ft over the past week. The 30-day range is 4,125.15 ft – 4,129.27 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
4,133.57 ft4.30 ft below the median for this date
Normal for this date
4,115.48 ft – 4,139.24 ft8 years in 10 fall in this range (36 years of records)
Same day last year
4,112.86 ft+16.41 ft
Lowest and highest in 30 days
4,125.15 ft – 4,129.27 ft
Lowest and highest in 12 months
4,112.60 ft – 4,137.98 ft

Boating and fishing at Willow Creek Reservoir

A lake in its usual range is what most ramps, docks and swimming areas are built for.

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.

19 Mon 67° 33° – Wind 10 mph
20 Tue 55° 38° – Wind 12 mph
21 Wed 72° 36° – Wind 12 mph
22 Thu 72° 49° – Wind 8 mph
23 Fri 57° 39° 0.04 in, 66% Wind 24 mph
24 Sat 48° 35° 0.02 in, 52% Wind 7 mph
25 Sun 61° 32° – Wind 14 mph

Forecast: Open-Meteo

Sunrise 07:55 AM Sunset 06:36 PM Daylight 10 hr, 41 min First quarter 61%

Map

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Sun River below Willow Cr near Augusta MTRiver gauge, Sun River 219 cfs High +13.0 cfs 2.9 mi
Pishkun Reservoir and DikesReservoir 4,349.24 ft Low 10 mi
Sun River below Diversion Dam near Augusta MTRiver gauge, Sun River 211 cfs Normal −3.0 cfs 13 mi
Gibson ReservoirReservoir 4,612.52 ft Low 16 mi
North Fork Sun River near Augusta MTRiver gauge, North Fork Sun River 3.41 ft Below flood stage −0.01 ft 21 mi
South Fork Sun River near Augusta MTRiver gauge, South Fork Sun River 92.1 cfs Normal −1.7 cfs 21 mi
Sun River at Simms MTRiver gauge, Sun River 2.85 ft Below flood stage +0.01 ft 23 mi
Teton River below South Fork near Choteau MTRiver gauge, Teton River 4.35 ft Below flood stage ±0 25 mi

Questions and answers

Is Willow Creek Reservoir higher than last year?

Yes, it is 16.41 ft higher than on the same day last year, when the reading was 4,112.86 ft.

What is a normal level for Willow Creek Reservoir in mid-October?

The median for mid-October is 4,133.57 ft. In 8 years out of 10 the reading falls between 4,115.48 ft and 4,139.24 ft, based on 36 years of records.

Is Willow Creek Reservoir really 4,129.27 ft deep?

No. 4,129.27 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 Willow Creek Reservoir today?

On Oct 18, 2026, the surface elevation was 4,129.27 ft. Up 0.98 ft over the last 7 days.

Is Willow Creek Reservoir rising or falling?

Up 0.98 ft over the last 7 days.

Is the level of Willow Creek Reservoir normal?

Normal 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:508 (Agency page)
Coordinates
47.54670, -112.42920 (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 4,129.27 ft 2026-10-18 06:00 Provisional
Water stored 15,978 acre‑ft 2026-10-18 06:00 Provisional

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How to cite

U.S. Bureau of Reclamation: Willow Creek Reservoir (usbr:508). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/montana/willow-creek-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.