Montana Lake & Reservoir Conditions — Live Water Data

Montana Lake & Reservoir Levels

Live USGS water level data — refreshed every 15 minutes

Live — 9 of 9 lakes reporting
📅 Updated Apr 15, 2026 at 2:29 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
Eastern Montana
Flathead Lake
at Polson
RISING
2,888.59
ft elevation
+0.30 ft / 7 days
7-Day Change
—
Water Temp
↑
Trend
↑ Rising
Largest natural freshwater lake W of Mississippi
Reading: 1:30 AM USGS →
Hebgen Lake
nr West Yellowstone
RISING
6,529.97
ft NGVD
+0.34 ft / 7 days
7-Day Change
—
Water Temp
↑
Trend
↑ Rising
World-class fly fishing
Reading: 1:45 AM USGS →
Hungry Horse Reservoir
nr Hungry Horse
STABLE
3,545.41
ft NGVD
No change
7-Day Change
—
Water Temp
→
Trend
→ Stable
Trophy bull trout & kokanee
Reading: 1:45 AM USGS →
Lake Sherburne
nr Babb
FALLING
4,784.84
ft NGVD
-0.89 ft / 7 days
7-Day Change
—
Water Temp
↓
Trend
↓ Falling
Inside Glacier National Park
Reading: 2:00 AM USGS →
Fort Peck Reservoir
nr Glasgow
STABLE
2,222.59
ft elevation
-0.10 ft today
Daily Change
—
Capacity
→
Trend
→ Stable
Walleye capital of Montana
Inflow — cfs • Release — cfs USACE →
Canyon Ferry Reservoir
nr Townsend
STABLE
3,785.86
ft elevation
+0.08 ft today
Daily Change
80.7%
Capacity
→
Trend
→ Stable
Missouri River — rainbow & brown trout
Inflow 4,320 cfs • Release 3,076 cfs USACE →
Bighorn Lake
nr Fort Smith
FALLING
3,613.85
ft elevation
-0.11 ft today
Daily Change
76.9%
Capacity
↓
Trend
↓ Falling
World-class brown trout fishery
Inflow 1,432 cfs • Release 1,752 cfs USACE →
Clark Canyon Reservoir
nr Grant
STABLE
5,531.81
ft elevation
+0.03 ft today
Daily Change
62.4%
Capacity
→
Trend
→ Stable
Southwest MT trophy trout
Inflow 88 cfs • Release 36 cfs USACE →
Lake Elwell (Tiber)
nr Chester
STABLE
2,987.41
ft elevation
+0.09 ft today
Daily Change
89.6%
Capacity
→
Trend
→ Stable
Walleye & perch fishing
Inflow 1,155 cfs • Release 412 cfs USACE →
Northwest Montana
Flathead Lake
at Polson
RISING
2,888.59
ft elevation
+0.30 ft / 7 days
7-Day Change
—
Water Temp
↑
Trend
↑ Rising
Largest natural freshwater lake W of Mississippi
Reading: 1:30 AM USGS →
Hungry Horse Reservoir
nr Hungry Horse
STABLE
3,545.41
ft NGVD
No change
7-Day Change
—
Water Temp
→
Trend
→ Stable
Trophy bull trout & kokanee
Reading: 1:45 AM USGS →
Lake Sherburne
nr Babb
FALLING
4,784.84
ft NGVD
-0.89 ft / 7 days
7-Day Change
—
Water Temp
↓
Trend
↓ Falling
Inside Glacier National Park
Reading: 2:00 AM USGS →
Southwest Montana
Hebgen Lake
nr West Yellowstone
RISING
6,529.97
ft NGVD
+0.34 ft / 7 days
7-Day Change
—
Water Temp
↑
Trend
↑ Rising
World-class fly fishing
Reading: 1:45 AM USGS →
Clark Canyon Reservoir
nr Grant
STABLE
5,531.81
ft elevation
+0.03 ft today
Daily Change
62.4%
Capacity
→
Trend
→ Stable
Southwest MT trophy trout
Inflow 88 cfs • Release 36 cfs USACE →
Central Montana
Canyon Ferry Reservoir
nr Townsend
STABLE
3,785.86
ft elevation
+0.08 ft today
Daily Change
80.7%
Capacity
→
Trend
→ Stable
Missouri River — rainbow & brown trout
Inflow 4,320 cfs • Release 3,076 cfs USACE →
Bighorn Lake
nr Fort Smith
FALLING
3,613.85
ft elevation
-0.11 ft today
Daily Change
76.9%
Capacity
↓
Trend
↓ Falling
World-class brown trout fishery
Inflow 1,432 cfs • Release 1,752 cfs USACE →
Lake Elwell (Tiber)
nr Chester
STABLE
2,987.41
ft elevation
+0.09 ft today
Daily Change
89.6%
Capacity
→
Trend
→ Stable
Walleye & perch fishing
Inflow 1,155 cfs • Release 412 cfs USACE →
Eastern Montana
Fort Peck Reservoir
nr Glasgow
STABLE
2,222.59
ft elevation
-0.10 ft today
Daily Change
—
Capacity
→
Trend
→ Stable
Walleye capital of Montana
Inflow — cfs • Release — 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.