Montana Water Data
Live conditions for every river, lake, and reservoir we cover. Flow, temperature, elevation, fishability — updated continuously from USGS and the US Army Corps bulletins. Tap any water for full details, maps, and the 7-day chart.
22waters20reporting now12rivers10lakes & reservoirs
Rivers
12 waters trackedMadison River
PRIME415cfs
live flow
View details →Gallatin River
HIGH1,330cfs
live flow
View details →Yellowstone River (Upper, near Livingston)
BLOWN OUT7,750cfs
live flow
View details →Big Hole River
FLOOD1,450cfs
live flow
View details →Clark Fork
PRIME5,120cfs
live flow
View details →Bitterroot River
HIGH4,220cfs
live flow
View details →Blackfoot River
FLOOD3,390cfs
live flow
View details →Flathead River
PRIME7,490cfs
live flow
View details →Missouri River (Upper, near Toston)
PRIME4,050cfs
live flow
View details →Yellowstone River (Lower, at Billings)
FLOOD14,000cfs
live flow
View details →Stillwater River
RIVER—
data unavailable
View details →Musselshell River
PRIME113cfs
live flow
View details →Lakes
3 waters trackedReservoirs
7 waters trackedHungry Horse Reservoir
LEVEL3,557.6ft
live elevation
View details →Nelson Reservoir
RESERVOIR—
data unavailable
View details →Fort Peck Lake
→2,223.7ft
86% of full pool
View details →Canyon Ferry Reservoir
→3,790.0ft
88% of full pool
View details →Bighorn Lake
↑3,622.4ft
82% of full pool
View details →Clark Canyon Reservoir
↓5,525.7ft
live elevation
View details →Lake Elwell (Tiber Reservoir)
↓2,992.4ft
99% of full pool
View details →Data live from USGS waterservices + USACE daily bulletin. Built Jun 12, 2026 · 08:30 AM.