Jag Lake
Vilas County, Wisconsin162 acresView mapDirections
No nutrient or algae sampling on record from Wisconsin DNR for this lake.
- Impaired · Mercury
- 14 ft max depth
- Public access
Jag Lake in Vilas County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 14 ft. Surface area: 162 acres.
Jag Lake is a 162-acre lake in Vilas County, Wisconsin with a maximum depth of 14 feet. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water. Methodology: how these readings are compared.
What Jag Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Camping1 public campground nearby
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Jag Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Whether Jag Lake is safe to swim in today is a call for the Wisconsin Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Jag Lake
These are the measurements Wisconsin DNR publishes for Jag 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 Jag Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
14 ft
Surface area
162 acres
Shoreline
3.1 mi
Public access
Yes
Listed by Wisconsin DNR
Recreation & Access
- Jag LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Public campgrounds near Jag Lake
- Upper Gresham Lake Campground1.1 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 Jag Lake
Compare lakeside cabins, hotels, and vacation rentals near Jag Lake in Vilas County, Wisconsin — 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 Jag Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Follow Jag Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Jag Lake
EPA Impairment Status
Jag Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Fish consumption.
Source: EPA ATTAINS assessment unit WI10003879 · Official waterbody report
Nearby Lakes in Vilas County
Frequently asked questions about Jag Lake
Where is Jag Lake?
- Jag Lake is a lake in Vilas County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Jag Lake?
- Jag Lake in Vilas County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 14 ft. Surface area: 162 acres.
Is Jag Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Jag Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
How deep is Jag Lake?
- Jag Lake has a maximum depth of 14 feet. The lake covers 162 acres.
Are there boat ramps on Jag Lake?
- Jag Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Jag Lake. Public access is listed as yes.
Can I fish at Jag Lake?
- Jag 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 Wisconsin's fish and wildlife agency, so check its current regulations before you go.
Are there campgrounds on Jag Lake?
- Jag Lake has 1 public campground from USGS The National Map within 5 km, including Upper Gresham 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.
Explore Jag Lake across LakeQuality
Fish species and the cleanest lakes across Wisconsin
Fish species and best lakes in Vilas County
Species activity outlook by water temperature and season
Top lakes and where to stay in the Northwoods Wisconsin area
Where to stay at Wisconsin's top lakes, each with its readings
Lakes in the Wisconsin River Watershed, ranked by water quality
Wisconsin's cleanest lakes, ranked on agency measurements
More lakes in Wisconsin
Other Lakes in Wisconsin
Where this data comes from
Measurements for Jag Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory
Public campgrounds from USGS The National Map Structures, within about 3 miles