Montana Lake & Reservoir Conditions — Live Water Data

Montana Lake & Reservoir Levels

Live USGS water level data — refreshed every 15 minutes

Live — 8 of 8 lakes reporting
📅 Updated Mar 26, 2026 at 12:29 AM
Rising fast (>+1.5 ft/week)
Rising (+0.3–1.5 ft/week)
Stable (±0.3 ft/week)
Falling (−0.3–1.5 ft/week)
Falling fast (>−1.5 ft/week)
All Lakes
Northwest Montana
Southwest Montana
Central Montana
Flathead Lake
at Polson
RISING
2,887.39
ft elevation
+0.58 ft / 7 days
7-Day Change
—
Water Temp
↑
Trend
↑ Rising
Largest natural freshwater lake W of Mississippi
Reading: 11:30 PM USGS →
Hebgen Lake
nr West Yellowstone
STABLE
6,529.03
ft NGVD
+0.23 ft / 7 days
7-Day Change
—
Water Temp
→
Trend
→ Stable
World-class fly fishing
Reading: 11:45 PM USGS →
Hungry Horse Reservoir
nr Hungry Horse
RISING FAST
3,544.83
ft NGVD
+4.56 ft / 7 days
7-Day Change
—
Water Temp
⇧
Trend
⇧ Rising fast
Trophy bull trout & kokanee
Reading: 11:45 PM USGS →
Lake Sherburne
nr Babb
RISING FAST
4,786.06
ft NGVD
+4.90 ft / 7 days
7-Day Change
—
Water Temp
⇧
Trend
⇧ Rising fast
Inside Glacier National Park
Reading: 12:00 AM USGS →
Canyon Ferry Reservoir
nr Townsend
STABLE
3,784.12
ft elevation
+0.06 ft today
Daily Change
77.8%
Capacity
→
Trend
→ Stable
Missouri River — rainbow & brown trout
Inflow 3,902 cfs • Release 3,012 cfs USACE →
Bighorn Lake
nr Fort Smith
FALLING
3,615.65
ft elevation
-0.24 ft today
Daily Change
78.0%
Capacity
↓
Trend
↓ Falling
World-class brown trout fishery
Inflow 1,004 cfs • Release 1,747 cfs USACE →
Clark Canyon Reservoir
nr Grant
STABLE
5,531.29
ft elevation
+0.03 ft today
Daily Change
61.2%
Capacity
→
Trend
→ Stable
Southwest MT trophy trout
Inflow 90 cfs • Release 35 cfs USACE →
Lake Elwell (Tiber)
nr Chester
RISING
2,985.52
ft elevation
+0.13 ft today
Daily Change
86.3%
Capacity
↑
Trend
↑ Rising
Walleye & perch fishing
Inflow 1,384 cfs • Release 334 cfs USACE →
Northwest Montana
Flathead Lake
at Polson
RISING
2,887.39
ft elevation
+0.58 ft / 7 days
7-Day Change
—
Water Temp
↑
Trend
↑ Rising
Largest natural freshwater lake W of Mississippi
Reading: 11:30 PM USGS →
Hungry Horse Reservoir
nr Hungry Horse
RISING FAST
3,544.83
ft NGVD
+4.56 ft / 7 days
7-Day Change
—
Water Temp
⇧
Trend
⇧ Rising fast
Trophy bull trout & kokanee
Reading: 11:45 PM USGS →
Lake Sherburne
nr Babb
RISING FAST
4,786.06
ft NGVD
+4.90 ft / 7 days
7-Day Change
—
Water Temp
⇧
Trend
⇧ Rising fast
Inside Glacier National Park
Reading: 12:00 AM USGS →
Southwest Montana
Hebgen Lake
nr West Yellowstone
STABLE
6,529.03
ft NGVD
+0.23 ft / 7 days
7-Day Change
—
Water Temp
→
Trend
→ Stable
World-class fly fishing
Reading: 11:45 PM USGS →
Clark Canyon Reservoir
nr Grant
STABLE
5,531.29
ft elevation
+0.03 ft today
Daily Change
61.2%
Capacity
→
Trend
→ Stable
Southwest MT trophy trout
Inflow 90 cfs • Release 35 cfs USACE →
Central Montana
Canyon Ferry Reservoir
nr Townsend
STABLE
3,784.12
ft elevation
+0.06 ft today
Daily Change
77.8%
Capacity
→
Trend
→ Stable
Missouri River — rainbow & brown trout
Inflow 3,902 cfs • Release 3,012 cfs USACE →
Bighorn Lake
nr Fort Smith
FALLING
3,615.65
ft elevation
-0.24 ft today
Daily Change
78.0%
Capacity
↓
Trend
↓ Falling
World-class brown trout fishery
Inflow 1,004 cfs • Release 1,747 cfs USACE →
Lake Elwell (Tiber)
nr Chester
RISING
2,985.52
ft elevation
+0.13 ft today
Daily Change
86.3%
Capacity
↑
Trend
↑ Rising
Walleye & perch fishing
Inflow 1,384 cfs • Release 334 cfs USACE →

Data: USGS National Water Information System — Elevations above NGVD 1929 or local datum. Provisional data subject to revision.

Lake levels fluctuate naturally with season, precipitation, and reservoir operations.