Sublette County Lake Quality

Wyoming, 12 lakes, average grade B (Good)

Sublette County has 12 graded lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. The county-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.

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. Nla Lake (A) is the cleanest in the county.

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Quick Answers for Sublette County

Cleanest lakes in Sublette County →Cleanest lakes in Wyoming →Safest swimming lakes in Wyoming →

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

All Lakes in Sublette County

Rank	Lake	Grade	Clarity	Phosphorus
1	Nla Lake	A	25.3 ft	7.7 µg/L
2	Half Moon Lake	A	22.2 ft	-
3	Lower New Fork Lake	A	22 ft	-
4	Boulder Lake	A	27.7 ft	-
5	Fremont Lake	A	42.8 ft	10 µg/L
6	Upper New Fork Lake	B	10.5 ft	-
7	Nla Lake	B	35.4 ft	12000 µg/L
8	Nla Lake	B	18.6 ft	14503.7 µg/L
9	Nla Lake	C	10.5 ft	15507.4 µg/L
10	Nla Lake	C	9.8 ft	18000 µg/L
11	Nla Lake	C	5 ft	26049.2 µg/L
12	Big Sandy Reservoir Rtpd	D	0.7 ft	60 µg/L