Castle Lake
Siskiyou County, California49 acresView mapDirections
No nutrient or algae sampling on record from SWRCB for this lake.
- Limited data
Castle Lake in Siskiyou County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 49 acres.
Castle Lake is a 49-acre lake in Siskiyou County, California.
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
What Castle Lake is good for
From access and monitoring records, not editorial picks.
- Camping2 public campgrounds nearby
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Castle Lake is safe to swim in today is a call for the California State Water Resources Control Board and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Castle Lake
These are the measurements SWRCB publishes for Castle 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.
Ask about Castle Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
49 acres
Shoreline
1.3 mi
No bathymetric survey has been published for Castle Lake, so its depth is not documented here.
Recreation & Access
Public campgrounds near Castle Lake
- Castle Lake Campground1.0 km
- Castle Lake Cg-F1.0 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 Castle Lake
Compare lakeside cabins, hotels, and vacation rentals near Castle Lake in Siskiyou County, California — 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 Castle Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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Fishing Castle Lake
Nearby Lakes in Siskiyou County
Frequently asked questions about Castle Lake
Where is Castle Lake?
- Castle Lake is a lake in Siskiyou County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Castle Lake?
- Castle Lake in Siskiyou County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 49 acres.
Is Castle Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Are there campgrounds on Castle Lake?
- Castle Lake has 2 public campgrounds from USGS The National Map within 5 km, including Castle Lake Campground, Castle Lake Cg-F. 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 Castle 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