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Boysen Reservoir water level

Reservoir, Wyoming, United States

Directions

Normal for mid-October

Surface elevation

4,711.00ft Up 0.78 ft over the last 7 days

Water stored
506,671 acre‑ft
4,700 4,710 4,720

History

4,7104,720ftOct 12Oct 13Oct 14Oct 15Oct 164,7104,720ftOct 12Oct 14Oct 16
4,7104,720ftSep 19Sep 25Oct 2Oct 9Oct 164,7104,720ftSep 19Oct 2Oct 16
4,7004,7104,720ftOct 2025Jan 2026Apr 2026Jul 2026Oct 20264,7004,7104,720ftOct 2025Apr 2026Oct 2026
4,7104,7204,730ftOct 2016Apr 2019Oct 2021Apr 2024Oct 20264,7104,7204,730ftOct 2016Oct 2021Oct 2026
4,7004,7104,7204,730ftJanMarMayJulSepNov20264,7004,7104,7204,730ftJanAprJulOct2026

202120222023202420252026

Surface elevation Normal range (10–90 %)

What this means

Boysen Reservoir is at 4,711.00 ft, in the normal range for mid-October.

That puts it 7.53 ft below the median of 4,718.53 ft for mid-October, based on 36 years of readings. A year ago it stood at 4,711.22 ft (−0.22 ft).

It has risen 0.78 ft over the past week. In the last month it has stayed between 4,709.54 ft and 4,711.00 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
4,718.53 ft7.53 ft below the median for this date
Normal for this date
4,701.98 ft – 4,721.80 ft8 years in 10 fall in this range (36 years of records)
Same day last year
4,711.22 ft−0.22 ft
Lowest and highest in 30 days
4,709.54 ft – 4,711.00 ft
Lowest and highest in 12 months
4,709.54 ft – 4,714.36 ft

On the water at Boysen Reservoir

Normal levels mean few surprises on the water: ramps in use and the shoreline where you expect it.

Wear a life jacket on the water. Most boating deaths involve people who were not wearing one.

Weather at the gauge

No rain in the last 3 days.

18 Sun 66° 40° – Wind 10 mph
19 Mon 66° 41° – Wind 10 mph
20 Tue 69° 51° – Wind 6 mph
21 Wed 68° 52° – Wind 8 mph
22 Thu 69° 55° – Wind 16 mph
23 Fri 65° 40° 0.14 in, 48% Wind 23 mph
24 Sat 48° 38° 0.09 in, 48% Wind 24 mph

Forecast: Open-Meteo

Sunrise 07:31 AM Sunset 06:26 PM Daylight 10 hr, 55 min First quarter 49%

Map

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Muddy Creek near ShoshoniRiver gauge, Muddy Creek 9.3 cfs Normal ±0 9 mi
Fivemile Creek near ShoshoniRiver gauge, Fivemile Creek 109 cfs Normal ±0 12 mi
Wind River above Boysen Reservoir, near ShoshoniRiver gauge, Wind River 3.48 ft Below flood stage −0.10 ft 19 mi
Wind River at RivertonRiver gauge, Wind River 4.22 ft Below flood stage −0.08 ft 29 mi
Little Wind River near RivertonRiver gauge, Little Wind River 2.93 ft Below flood stage −0.08 ft 30 mi
Pilot Butte ReservoirReservoir 5,453.63 ft High 32 mi
Wind River near KinnearRiver gauge, Wind River 4.38 ft Below flood stage −0.08 ft 32 mi
Anchor ReservoirReservoir 6,369.50 ft Very high 37 mi

Questions and answers

How does Boysen Reservoir compare with last year?

It is 0.22 ft lower than on the same day last year, when the reading was 4,711.22 ft.

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

The median for mid-October is 4,718.53 ft. In 8 years out of 10 the reading falls between 4,701.98 ft and 4,721.80 ft, based on 36 years of records.

Is Boysen Reservoir really 4,711.00 ft deep?

No. 4,711.00 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 Boysen Reservoir today?

On Oct 16, 2026, the surface elevation was 4,711.00 ft. Up 0.78 ft over the last 7 days.

Is Boysen Reservoir rising or falling?

Up 0.78 ft over the last 7 days.

Is the level of Boysen 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:281 (Agency page)
Coordinates
43.40000, -108.17690 (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 4,711.00 ft 2026-10-16 06:00 Provisional
Water stored 506,671 acre‑ft 2026-10-16 06:00 Provisional

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How to cite

U.S. Bureau of Reclamation: Boysen Reservoir (usbr:281). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/united-states/wyoming/boysen-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