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 Jul 19, 2026 at 6:14 PM
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
STABLE
2,893.00
ft elevation
-0.03 ft / 7 days
7-Day Change
—
Water Temp
→
Trend
→ Stable
Largest natural freshwater lake W of Mississippi
Reading: 5:30 PM USGS →
Hebgen Lake
nr West Yellowstone
FALLING
6,533.88
ft NGVD
-0.42 ft / 7 days
7-Day Change
—
Water Temp
↓
Trend
↓ Falling
World-class fly fishing
Reading: 5:45 PM USGS →
Hungry Horse Reservoir
nr Hungry Horse
FALLING
3,558.48
ft NGVD
-0.57 ft / 7 days
7-Day Change
—
Water Temp
↓
Trend
↓ Falling
Trophy bull trout & kokanee
Reading: 5:45 PM USGS →
Lake Sherburne
nr Babb
STABLE
4,787.60
ft NGVD
+0.10 ft / 7 days
7-Day Change
—
Water Temp
→
Trend
→ Stable
Inside Glacier National Park
Reading: 5:00 PM USGS →
Fort Peck Reservoir
nr Glasgow
STABLE
2,224.23
ft elevation
-0.01 ft today
Daily Change
86.9%
Capacity
→
Trend
→ Stable
Walleye capital of Montana
Inflow 8,000 cfs • Release 6,800 cfs USACE →
Canyon Ferry Reservoir
nr Townsend
STABLE
3,791.05
ft elevation
-0.02 ft today
Daily Change
89.5%
Capacity
→
Trend
→ Stable
Missouri River — rainbow & brown trout
Inflow 1,701 cfs • Release 3,345 cfs USACE →
Bighorn Lake
nr Fort Smith
STABLE
3,623.48
ft elevation
+0.09 ft today
Daily Change
83.3%
Capacity
→
Trend
→ Stable
World-class brown trout fishery
Inflow 2,239 cfs • Release 1,896 cfs USACE →
Clark Canyon Reservoir
nr Grant
FALLING
5,520.38
ft elevation
-0.18 ft today
Daily Change
39.3%
Capacity
↓
Trend
↓ Falling
Southwest MT trophy trout
Inflow 281 cfs • Release 557 cfs USACE →
Lake Elwell (Tiber)
nr Chester
FALLING
2,992.61
ft elevation
-0.14 ft today
Daily Change
99.3%
Capacity
↓
Trend
↓ Falling
Walleye & perch fishing
Inflow 733 cfs • Release 1,545 cfs USACE →
Northwest Montana
Flathead Lake
at Polson
STABLE
2,893.00
ft elevation
-0.03 ft / 7 days
7-Day Change
—
Water Temp
→
Trend
→ Stable
Largest natural freshwater lake W of Mississippi
Reading: 5:30 PM USGS →
Hungry Horse Reservoir
nr Hungry Horse
FALLING
3,558.48
ft NGVD
-0.57 ft / 7 days
7-Day Change
—
Water Temp
↓
Trend
↓ Falling
Trophy bull trout & kokanee
Reading: 5:45 PM USGS →
Lake Sherburne
nr Babb
STABLE
4,787.60
ft NGVD
+0.10 ft / 7 days
7-Day Change
—
Water Temp
→
Trend
→ Stable
Inside Glacier National Park
Reading: 5:00 PM USGS →
Southwest Montana
Hebgen Lake
nr West Yellowstone
FALLING
6,533.88
ft NGVD
-0.42 ft / 7 days
7-Day Change
—
Water Temp
↓
Trend
↓ Falling
World-class fly fishing
Reading: 5:45 PM USGS →
Clark Canyon Reservoir
nr Grant
FALLING
5,520.38
ft elevation
-0.18 ft today
Daily Change
39.3%
Capacity
↓
Trend
↓ Falling
Southwest MT trophy trout
Inflow 281 cfs • Release 557 cfs USACE →
Central Montana
Canyon Ferry Reservoir
nr Townsend
STABLE
3,791.05
ft elevation
-0.02 ft today
Daily Change
89.5%
Capacity
→
Trend
→ Stable
Missouri River — rainbow & brown trout
Inflow 1,701 cfs • Release 3,345 cfs USACE →
Bighorn Lake
nr Fort Smith
STABLE
3,623.48
ft elevation
+0.09 ft today
Daily Change
83.3%
Capacity
→
Trend
→ Stable
World-class brown trout fishery
Inflow 2,239 cfs • Release 1,896 cfs USACE →
Lake Elwell (Tiber)
nr Chester
FALLING
2,992.61
ft elevation
-0.14 ft today
Daily Change
99.3%
Capacity
↓
Trend
↓ Falling
Walleye & perch fishing
Inflow 733 cfs • Release 1,545 cfs USACE →
Eastern Montana
Fort Peck Reservoir
nr Glasgow
STABLE
2,224.23
ft elevation
-0.01 ft today
Daily Change
86.9%
Capacity
→
Trend
→ Stable
Walleye capital of Montana
Inflow 8,000 cfs • Release 6,800 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.