Where is Williams Lake?

Williams Lake is a lake in Lemhi County, Idaho. Its water-quality measurements are published by Idaho DEQ and shown on this page as reported.

Are there boat ramps on Williams Lake?

Williams Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include North Shore. Public access is listed as yes.

Can I fish at Williams Lake?

Williams Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Idaho's fish and wildlife agency, so check its current regulations before you go.

Are there campgrounds on Williams Lake?

Williams Lake has 1 public campground from USGS The National Map within 5 km, including Williams Lake Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.

Williams Lake

Lemhi County, Idaho181 acresView map Directions

No nutrient or algae sampling on record from Idaho DEQ for this lake.

Area

181 acres

Surface area

Shoreline

3.2 mi

Measured length

Impaired · Nutrients (phosphorus, nitrogen)
Public access

See the measurements Directions Where to stay

Williams Lake in Lemhi County, Idaho has water-quality measurements published by Idaho DEQ, shown here as reported. Surface area: 181 acres.

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Williams Lake is a 181-acre lake in Lemhi County, Idaho. Limited fish-species data available. Public access is available with 1 public boat landing.

Source: EPA Water Quality Portal sampling records, IDEQ. Methodology: how these readings are compared.

What Williams Lake is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp
Camping1 public campground nearby

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Williams Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.

Whether Williams Lake is safe to swim in today is a call for the Idaho Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Williams Lake

These are the measurements Idaho DEQ publishes for Williams Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

No clarity data. TSI undefined.

Ask about Williams Lake

Answers come straight from the public measurements and survey records on this page.

Lake Details

Surface area

181 acres

Shoreline

3.2 mi

Public access

Yes

Listed by Idaho DEQ

No bathymetric survey has been published for Williams Lake, so its depth is not documented here.

Recreation & Access

Boat Landings

Yes

Public Access

Campgrounds

North ShorePublic

Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps

Public campgrounds near Williams Lake

Williams Lake Campground1.0 km

Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes

Stays via Stay22

Stays near Williams Lake

Compare lakeside cabins, hotels, and vacation rentals near Williams Lake in Lemhi County, Idaho — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

Top-rated places to stay near Williams Lake

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Planning a trip? Cabins and lodging at Williams Lake → · more Idaho lake trips

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Fishing Williams Lake

→ Williams Lake fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Williams Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).

Causes of impairment

Nutrients (phosphorus, nitrogen)

Designated uses not supporting: Aquatic life.

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit ID17060203SL047_02L · Official waterbody report

Nearby Lakes in Lemhi County

Bear Valley Lakes15.7 miView →Mill Lake29.4 miView →Goat Lake—View →Ship Island Lake—View →

Frequently asked questions about Williams Lake

Where is Williams Lake?: Williams Lake is a lake in Lemhi County, Idaho. Its water-quality measurements are published by Idaho DEQ and shown on this page as reported.
What is the water quality of Williams Lake?: Williams Lake in Lemhi County, Idaho has water-quality measurements published by Idaho DEQ, shown here as reported. Surface area: 181 acres.
Is Williams Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Williams Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Are there boat ramps on Williams Lake?: Williams Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include North Shore. Public access is listed as yes.
Can I fish at Williams Lake?: Williams Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Idaho's fish and wildlife agency, so check its current regulations before you go.
Are there campgrounds on Williams Lake?: Williams Lake has 1 public campground from USGS The National Map within 5 km, including Williams Lake Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.