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LakeQuality
Late afternoon sun over Slim Lake, scattering a bright path across wind-textured water
B

Fremont County Lake Quality

Wyoming, 134 lakes, average grade B (Good)

Fremont County in Wyoming carries 134 monitored lakes — one of the lake-richer counties in our dataset. Coverage that dense usually reflects active lake-association sampling alongside state-agency monitoring. 6 of those lakes carry an A–F grade. The county-level summary describes that subset, not every water body listed. 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. Lake Cameahwait (B) is the cleanest in the county.

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Where to stay near Fremont County

Top-rated places to stay near Fremont County

Prices for Sep 11–13, 4 adults. Change dates on the map below.

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Quick Answers for Fremont County

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

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

All Lakes in Fremont County

134 lakes · 6 graded, 128 not rated6 graded lakes · 128 not rated, hidden

#LakeGradeClarityPhosphorusAlgaeTrophicAccess
1BLake CameahwaitFremontB11.6 ft10 µg/LNo recent samplesNo recent samples✓ Public
2BOcean LakeFremontB2.2 ft25 µg/LNo recent samplesNo recent samples✓ Public
3BBoysen Reservoir Transitional EmbaymentFremontB11 ft10 µg/LNo recent samplesNo recent samplesNot recorded
4BWorthen Meadows ReservoirFremontB15.9 ft10 µg/LNo recent samplesNo recent samples✓ Public
5BFrye LakeFremontB8.4 ft10 µg/LNo recent samplesNo recent samplesNot recorded
6DBrooks LakeFremontD6.3 ft50 µg/LNo recent samplesNo recent samplesNot recorded
NRUpper Brooks LakeFremontNRNo recent samples70 µg/LNo recent samplesNo recent samplesNot recorded
NRLower Jade LakeFremontNRNo recent samples20 µg/LNo recent samplesNo recent samplesNot recorded
NRLower Jade Lake OutletFremontNRNo recent samples70 µg/LNo recent samplesNo recent samplesNot recorded
NRLower Jade Lake LittoralFremontNRNo recent samples30 µg/LNo recent samplesNo recent samplesNot recorded
NRLower Jade Lake InletFremontNRNo recent samples80 µg/LNo recent samplesNo recent samplesNot recorded
NRUpper Brooks LakeFremontNRNo recent samples80 µg/LNo recent samplesNo recent samplesNot recorded
NRUpper Brooks Lake PelagicFremontNRNo recent samples80 µg/LNo recent samplesNo recent samplesNot recorded
NRPilot Butte Reservoir LpdFremontNRNo recent samples30 µg/LNo recent samplesNo recent samples✓ Public
NRPilot Butte Reservoir RtpdFremontNRNo recent samples50 µg/LNo recent samplesNo recent samplesNot recorded
NRKinnear Lake DFremontNRNo recent samples130 µg/LNo recent samplesNo recent samplesNot recorded
NRChristina LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGustave LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHay Meadow ReservoirFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLouis LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
NRUpper Rock Creek ReservoirFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGoldman MeadowsFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCircle Bar LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRPicket LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLost Creek ReservoirFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDaley LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCarmody LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRRongis ReservoirFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRFuller ReservoirFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBonneville ReservoirFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBoysen ReservoirFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMiddle ReservoirFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRUpper ReservoirFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRAlkali LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDry LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRFiddlers LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
NRRay ReservoirFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRPie LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRShoe LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMoss LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRValentine LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSouth Fork LakesFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSouth Fork LakesFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCook LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSmith LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMiddle LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRPetes LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRShoshone LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLeg LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRUpper Silas LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRTomahawk LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWindy LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRStough Creek LakesFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLong LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLonesome LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWashakie LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMacon LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLoch LevenFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSpearpoint LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGrave LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDarren LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMoraine LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBaptiste LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRRoberts LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRTrail LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWykee LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake PolarisFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake SolitudeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake KagevahFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSpider LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSonnicant LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake HeebeecheecheFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMilky LakesFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDeadman LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMilky LakesFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMilky LakesFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDennis LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRUpper Golden LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCamp LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBig Milky LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLittle Milky LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRKirkland LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRAlpine LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSteamboat LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHatchet LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRElk LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRTigee LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRRaft LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMovo LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRTwin LakesFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRYahtic LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWashakie ReservoirFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBull LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHays ReservoirFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLittle Bob LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCrater LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRNative LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDouble LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRKlondike LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDowns LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRFlorence LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRNoel LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCub LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDon LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRAlpine LakesFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRAlpine LakesFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSnowbridge LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake of the WoodsFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSnowband LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMile Long LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCrystal LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRUpper Ross LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBomber LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRUpper Phillips LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake LouiseFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRRoss LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHidden LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRTrail LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRRing LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
NRTorrey LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
NRSimpson LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMoon LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRPelham LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRTrail LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRFerry LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCrater LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDinwoody LakesFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMud LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRUpper Dinwoody LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDinwoody LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRRolff LakeFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRArapahoe ReservoirFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBarquin ReservoirFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBargee ReservoirFremontNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded

NR = not rated: there is not enough recent sampling to support a letter. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.

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Other Counties in Wyoming

Johnson County

32 lakes · Avg grade B

Sublette County

117 lakes · Avg grade B

Natrona County

36 lakes · Avg grade B

Crook County

9 lakes · Avg grade B

Sheridan County

11 lakes · Avg grade B

Albany County

67 lakes · Avg grade B

See how Fremont County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..

Source: EPA National Aquatic Resource Surveys, 2026.