Montana lake & reservoir water levels
Montana has 4 lakes and reservoirs tracked here — 4 with a current elevation reading, from USGS Water Services and USACE CWMS Data. Sort the table by level, storage, %-full, or trend, then open any lake for its full elevation-with-datum, trend sparkline, storage, and source-and-vintage stamp. Figures are provisional readings for reference — not for navigation or safety decisions.
- Lakes tracked
- 4
- With elevation reading
- 4
- With %-full figure
- 0
4 report a current pool-elevation reading; the rest report storage only.
All Montana lakes
Every lake tracked in Montana. Click a column heading to sort, or filter by name. Elevation lakes are listed before storage-only lakes; a missing figure always shows "not reported," never an estimate.
| Datum | Trend | ||||
|---|---|---|---|---|---|
| Georgetown Lake | 6,429.63 | NAVD88 | — | — | ↑Rising |
| Hebgen Lake | 6,534.17 | NGVD29 | — | — | ↓Falling |
| Hungry Horse Reservoir | 3,558.96 | NGVD29 | — | — | ↑Rising |
| Lake Sherburne at Sherburne | 4,788.01 | NGVD29 | — | — | ↑Rising |
Data: USGS Water Services (waterservices.usgs.gov) and USACE CWMS Data (cwms-data.usace.army.mil), retrieved 2026-07-14. Both public domain (a work of the U.S. Government, 17 U.S.C. §105).
Frequently asked questions
- How many lakes and reservoirs in Montana are tracked here?
- 4, of which 4 report a current pool-elevation reading. The rest report storage only, or lack a fresh reading and are not published.
- Which Montana lakes report a %-full figure?
- None of Montana's lakes in this dataset currently have a source-provided %-full figure — we show the bare level rather than estimate one.
- Where does the data come from?
- USGS Water Services and USACE CWMS Data, both public domain. See the methodology page for the exact endpoints and update cadence.
Explore
Read the methodology behind these figures, or search all lakes nationally from the home page.