Lakes / Washington / Deepest Natural Lakes in Washington

Deepest Natural Lakes in Washington

Ranked by approximate maximum depth, from Washington Dept. of Ecology bathymetry. No exact published max depth exists for these lakes, so every depth here is a contour-based estimate and reads as About X ft. Only natural lakes are ranked - reservoirs and flowages are excluded.

#	Lake	County	Surface Area	Max Depth
1	Lake Chelan	Chelan	32,677 acres	About 1,500 ft
2	Lake Crescent	Clallam	5,022 acres	About 600 ft
3	Sullivan Lake	Pend Oreille	1,296 acres	About 330 ft
4	Ozette Lake	Clallam	7,433 acres	About 320 ft
5	Lake Wenatchee	Chelan	2,419 acres	About 240 ft
6	Lake Stevens	Snohomish	1,003 acres	About 155 ft
7	Wannacut Lake	Okanogan	428 acres	About 140 ft
8	Davis Lake	Pend Oreille	148 acres	About 140 ft
9	Curlew Lake	Ferry	860 acres	About 120 ft
10	Williams Lake	Spokane	317 acres	About 120 ft
11	Soda Lake	Grant	154 acres	About 120 ft
12	Packwood Lake	Lewis	449 acres	About 115 ft
13	Lake Roesiger	Snohomish	346 acres	About 115 ft
14	Deep Lake	Grant	101 acres	About 115 ft
15	Conconully Lake	Okanogan	292 acres	About 110 ft
16	Lake Saint Clair	Thurston	233 acres	About 110 ft
17	Bonaparte Lake	Okanogan	151 acres	About 110 ft
18	Badger Lake	Spokane	217 acres	About 105 ft
19	Loon Lake	Stevens	1,093 acres	About 100 ft
20	Summit Lake	Thurston	512 acres	About 100 ft
21	Clear Lake	Spokane	331 acres	About 95 ft
22	Upper Goose Lake	Grant	130 acres	About 95 ft
23	American Lake	Pierce	1,092 acres	About 90 ft
24	Mason Lake	Mason	977 acres	About 90 ft
25	Soap Lake	Grant	844 acres	About 90 ft
26	Marshall Lake	Pend Oreille	195 acres	About 90 ft
27	Long Lake	Grant	73 acres	About 90 ft
28	Bumping Lake	Yakima	1,354 acres	About 89 ft
29	Park Lake	Grant	338 acres	About 85 ft
30	Patterson Lake	Okanogan	160 acres	About 85 ft
31	Gillette Lake	Stevens	48 acres	About 85 ft
32	Sherry Lake	Stevens	25 acres	About 85 ft
33	Lake Cavanaugh	Skagit	833 acres	About 80 ft
34	Lake Sutherland	Clallam	366 acres	About 80 ft
35	Clear Lake	Pierce	156 acres	About 80 ft
36	Bosworth Lake	Snohomish	102 acres	About 79 ft
37	Merrill Lake	Cowlitz	277 acres	About 77 ft
38	Osoyoos Lake	Okanogan	3,706 acres	About 75 ft
39	Osoyoos Lake	Okanogan	2,059 acres	About 75 ft
40	Deer Lake	Stevens	1,146 acres	About 75 ft
41	Silver Lake	Spokane	446 acres	About 75 ft
42	Alta Lake	Okanogan	220 acres	About 75 ft
43	Pierre Lake	Stevens	86 acres	About 75 ft
44	Lower Goose Lake	Grant	65 acres	About 75 ft
45	Palmer Lake	Okanogan	2,042 acres	About 70 ft
46	Sacheen Lake	Pend Oreille	307 acres	About 70 ft
47	Lake Ki	Snohomish	96 acres	About 70 ft
48	Fan Lake	Pend Oreille	73 acres	About 70 ft
49	Canal Lake	Grant	69 acres	About 70 ft
50	Lake Martha	Snohomish	60 acres	About 70 ft
51	Deep Lake	King	39 acres	About 70 ft
52	Flowing Lake	Snohomish	131 acres	About 69 ft
53	Ward Lake	Thurston	66 acres	About 67 ft
54	Blue Lake	Grant	534 acres	About 65 ft
55	Waitts Lake	Stevens	469 acres	About 65 ft
56	Lacamas Lake	Clark	260 acres	About 65 ft
57	Wapato Lake	Chelan	195 acres	About 65 ft
58	Blue Lake	Okanogan	193 acres	About 65 ft
59	Big Twin Lake	Okanogan	65 acres	About 65 ft
60	Cain Lake	Whatcom	71 acres	About 62 ft
61	Medical Lake	Spokane	138 acres	About 60 ft
62	Lost Lake	Mason	123 acres	About 60 ft
63	Fish Lake	Okanogan	102 acres	About 60 ft
64	Aeneas Lake	Okanogan	53 acres	About 60 ft
65	Pipe Lake	King	52 acres	About 60 ft
66	Round Lake	Clark	29 acres	About 60 ft
67	Battle Ground Lake	Clark	25 acres	About 60 ft
68	North Twin Lake	Ferry	876 acres	About 55 ft
69	Diamond Lake	Pend Oreille	753 acres	About 55 ft
70	Jameson Lake	Douglas	494 acres	About 55 ft
71	Spectacle Lake	Okanogan	313 acres	About 55 ft
72	Lake Thomas	Stevens	161 acres	About 55 ft
73	Gravelly Lake	Pierce	148 acres	About 55 ft
74	Devereaux Lake	Mason	98 acres	About 55 ft
75	Beaver Lake	King	71 acres	About 55 ft
76	Lake McMurray	Skagit	155 acres	About 52 ft
77	Angle Lake	King	103 acres	About 52 ft
78	Lake Goodwin	Snohomish	535 acres	About 50 ft
79	Lake Pleasant	Clallam	492 acres	About 50 ft
80	Lake Sawyer	King	286 acres	About 50 ft
81	Harts Lake	Pierce	112 acres	About 50 ft
82	Lake Joy	King	103 acres	About 50 ft
83	Lake Cochran	Snohomish	33 acres	About 50 ft
84	Windmill Lake	Grant	30 acres	About 50 ft
85	Lake Howard	Snohomish	26 acres	About 50 ft
86	Blue Lake	Okanogan	20 acres	About 50 ft
87	Echo Lake	Snohomish	16 acres	About 50 ft
88	Martha Lake	Snohomish	59 acres	About 48 ft
89	Deep Lake	Stevens	191 acres	About 45 ft
90	Pearrygin Lake	Okanogan	183 acres	About 45 ft
91	Black Lake	Stevens	69 acres	About 45 ft
92	Crabapple Lake	Snohomish	35 acres	About 45 ft
93	Clear Lake	Skagit	220 acres	About 44 ft
94	Fish Lake	Chelan	503 acres	About 40 ft
95	Tiger Lake	Mason	104 acres	About 40 ft
96	Storm Lake	Snohomish	73 acres	About 40 ft
97	Green Lake	Okanogan	45 acres	About 40 ft
98	Williams Lake	Stevens	34 acres	About 40 ft
99	Riley Lake	Snohomish	30 acres	About 40 ft
100	Moses Lake	Grant	6,716 acres	About 36 ft

Showing the top 100 of 204 counted lakes. Search above, or browse by county on the Washington page, for the full inventory.

Source: Washington Dept. of Ecology bathymetry (depths) and Washington DFW lake data. Verified October 30, 2026. New lakes are added as their records are verified - rankings update with every addition.