Monon Lake
Jefferson County, Oregon94 acresView mapDirections
No nutrient or algae sampling on record from Oregon DEQ for this lake.
Monon Lake in Jefferson County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Surface area: 94 acres.
Monon Lake is a 94-acre lake in Jefferson County, Oregon.
Source: EPA Water Quality Portal sampling records, Oregon DEQ. Methodology: how these readings are compared.
What Monon Lake is good for
From access and monitoring records, not editorial picks.
- Camping1 public campground nearby
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Monon Lake is safe to swim in today is a call for the Oregon Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Monon Lake
These are the measurements Oregon DEQ publishes for Monon 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 Monon Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
94 acres
Shoreline
2.7 mi
No bathymetric survey has been published for Monon Lake, so its depth is not documented here.
Recreation & Access
Public campgrounds near Monon Lake
- Horseshoe Lake (olallie)1.4 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 Monon Lake
Compare lakeside cabins, hotels, and vacation rentals near Monon Lake in Jefferson County, Oregon — 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 Monon Lake
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Fishing Monon Lake
Nearby Lakes in Jefferson County
Frequently asked questions about Monon Lake
Where is Monon Lake?
- Monon Lake is a lake in Jefferson County, Oregon. Its water-quality measurements are published by Oregon DEQ and shown on this page as reported.
What is the water quality of Monon Lake?
- Monon Lake in Jefferson County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Surface area: 94 acres.
Is Monon Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Are there campgrounds on Monon Lake?
- Monon Lake has 1 public campground from USGS The National Map within 5 km, including Horseshoe Lake (olallie). 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.
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Where this data comes from
Measurements for Monon Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Public campgrounds from USGS The National Map Structures, within about 3 miles