Klamath County Lake Quality

Oregon, 20 lakes, average grade C (Fair)

There are 20 graded lakes in Klamath County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. The county average is C — the middle of the rubric, with one or two lakes pulling the average up or down depending on year.

Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Odell Lake (A) is the cleanest in the county.

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Quick Answers for Klamath County

Cleanest lakes in Klamath County →Cleanest lakes in Oregon →Safest swimming lakes in Oregon →

Planning a trip? Check special fishing regulations for Odell Lake — or check the official Oregon fishing regulations.

All Lakes in Klamath County

Rank	Lake	Grade	Clarity	Phosphorus
1	Odell Lake	A	22.3 ft	-
2	Crescent Lake	A	42.2 ft	-
3	Odell Lake	A	18.7 ft	-
4	Crescent Lake	A	51.7 ft	-
5	Odell Lake	A	-	-
6	Crescent Lake	A	-	-
7	Lake of the Woods	A	-	-
8	Fourmile Lake	A	-	-
9	Williamson River Outlet Lake	F	-	165 µg/L
10	Mid-Trench Lake	F	-	240 µg/L
11	Fremont Bridge Lake	F	-	200 µg/L
12	Agency Lake South	F	-	110 µg/L
13	Shoalwater Bay Lake	F	-	220 µg/L
14	Upper Klamath Lake	F	-	195 µg/L
15	Rattlesnake Point Lake	F	-	185 µg/L
16	Mid-North Lake	F	-	180 µg/L
17	Upper Klamath Lake	F	-	-