States

Clark Canyon Reservoir

Montana · Reclamation gauge
5,5155,5205,5255,530
Grey bar: 12-month range 5,513.6–5,532.1 ft.
Water level · NGVD29
5,517.85FT
Storage 61,043 acre-feet
The source publishes no % full figure.
7 days +0.97 ft30 days +2.83 ft
Reading for Oct 24, 2026 · page refreshed Oct 25, 20:24 UTC
Source: U.S. Bureau of Reclamation (RISE)
Worth going today?This Afternoon
Looks good
Light wind, dry
Wind6 mph
Rain0%
Temp43°F
Level5,517.9 ft
This AfternoonPatchy Fog · 43°F
NE 6 mph · rain 0%
TonightMostly Cloudy then Patchy Fog · 25°F
ENE 5 mph · rain 1%
NWS forecast for the gauge location. Good = wind ≤ 10 mph and rain ≤ 30%; storms are flagged. Not safety advice – check local conditions, closures and warnings.

Level history

5,5155,5165,5175,518ftSep 24Oct 2Oct 9Oct 16Oct 24
5,5155,5165,5175,518ftSep 24Oct 9Oct 24
5,5155,5205,5255,530ftDec 2025Mar 2026May 2026Aug 2026Oct 2026
5,5155,5205,5255,530ftDec 2025May 2026Oct 2026

Field notes

As of Oct 24, 2026, Clark Canyon Reservoir stood at 5,517.85 (NGVD29) ft.

Reclamation reports storage of 61,043 acre-feet for the same day.

Over the past 7 days the lake has been rising (+0.97 ft), and it is +2.83 ft over 30 days.

Readings come from the Bureau of Reclamation's daily reservoir data for Clark Canyon Reservoir and Dam.

Lake facts

Storage (latest)61,043 acre-feet
Gauge / stationClark Canyon Reservoir and Dam
Elevation datumft (NGVD29)
Gauge location45.0017, -112.8575

Nearby lakes

Lima Reservoir Upstream of Clark Canyon Reservoir34 mi SE6,567.52 ft+0.25 ftHebgen Lake75 mi E6,529.84 ft−0.07 ftHenrys Lake79 mi E · ID12.98 ft+0.11 ftIsland Park Reservoir82 mi SE · ID6,283.16 ft+1.68 ftLake Como99 mi NW4,204.95 ft−0.80 ft

Common questions

Is Clark Canyon Reservoir rising or falling?

Over the last 7 days it changed +0.97 ft and over 30 days +2.83 ft.

How full is Clark Canyon Reservoir?

Reclamation publishes the water surface elevation for this gauge but not a percent-full figure, so we don't show one rather than estimate it.

How often is this page updated?

The page is rebuilt automatically every day from Reclamation's published data. Values can be revised later by the source agency.

Where does the data come from?

The U.S. Bureau of Reclamation's RISE data portal (data.usbr.gov). Forecasts come from the National Weather Service.

Daily values published by the Bureau of Reclamation; provisional and subject to revision. Reclamation data are provisional and subject to revision unless otherwise noted. This page is not affiliated with or endorsed by the Bureau of Reclamation. See data sources.