How many lakes and reservoirs in Washington are tracked here?

24, of which 24 report a current pool-elevation reading. The rest report storage only, or lack a fresh reading and are not published.

Which Washington lakes report a %-full figure?

None of Washington'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.

Washington lake & reservoir water levels

24 lakes tracked · 24 with a current elevation reading · USGS Water Services + USACE CWMS Data

Washington has 24 lakes and reservoirs tracked here — 24 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.

Statewide totals Washington · USGS + USACE

Lakes tracked: 24
With elevation reading: 24
With %-full figure: 0

All Washington lakes

Every lake tracked in Washington. 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.

Filter lakes

Washington lakes, elevation lakes first, by name.
		Datum			Trend
Baker Lake	725.81	NAVD88	—	—	→Steady
Bennington Lake	1,198.52	NGVD29	—	—	↓Falling
Castle Lake	2,577.54	NGVD29	—	—	↓Falling
Conconcully Reservoir	2,255.39	NGVD29	—	—	↓Falling
Conconully Lake at Conconully	2,300.91	NGVD29	—	—	↓Falling
Franklin Roosevelt Lake	1,284.17	NGVD29	—	—	↓Falling
Howard a Hanson Reservoir	1,153.37	NGVD29	34,230	—	↓Falling
Lake Merwin	235.00	NGVD29	—	—	→Steady
Lake Quinault	184.12	NAVD88	—	—	↓Falling
Lake Shannon at Concrete	410.53	NAVD88	—	—	↓Falling
Lake Tapps	540.91	NGVD29	42,700	—	↑Rising
Lenore Lake	1,076.92	NGVD29	—	—	↓Falling
Moses Lake at Moses Lake	1,046.73	NGVD29	—	—	→Steady
Mud Mountain Lake	917.85	NGVD29	20	—	↓Falling
Osoyoos Lake	911.28	NGVD29	—	—	↓Falling
Sammamish Lake	25.72	NGVD29	—	—	↓Falling
Soap Lake	1,068.53	NGVD29	—	—	↓Falling
South Fork Tolt Reservoir	1,735.96	NGVD29	—	—	↓Falling
Spada Lake	1,425.95	NGVD29	—	—	↓Falling
Spirit Lake at Tunnel at Spirit Lake	3,400.49	NGVD29	—	—	→Steady
Spirit Lake West at Spirit Lake	3,441.68	NGVD29	—	—	↑Rising
Swift Reservoir 3.2 Mi East of Dam	966.00	NGVD29	—	—	↓Falling
Wynoochee Lake	749.36	NGVD29	24,990	—	↓Falling
Yale Reservoir	474.00	NGVD29	—	—	→Steady

Data: USGS Water Services (waterservices.usgs.gov) and USACE CWMS Data (cwms-data.usace.army.mil), retrieved 2026-08-31. Both public domain (a work of the U.S. Government, 17 U.S.C. §105).

Frequently asked questions

How many lakes and reservoirs in Washington are tracked here?: 24, of which 24 report a current pool-elevation reading. The rest report storage only, or lack a fresh reading and are not published.
Which Washington lakes report a %-full figure?: None of Washington'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.