Split Rock Lake
LaSalle County, Illinois163 acresView mapDirections
No nutrient or algae sampling on record from Illinois EPA for this lake.
Split Rock Lake in LaSalle County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Surface area: 163 acres.
Split Rock Lake is a 163-acre lake in LaSalle County, Illinois.
Source: EPA Water Quality Portal sampling records, Illinois EPA. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Split Rock Lake is safe to swim in today is a call for the Illinois Environmental Protection Agency and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Split Rock Lake
These are the measurements Illinois EPA publishes for Split Rock 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 Split Rock Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
163 acres
Shoreline
5.2 mi
No bathymetric survey has been published for Split Rock Lake, so its depth is not documented here.
Stays via Stay22
Stays near Split Rock Lake
Compare lakeside cabins, hotels, and vacation rentals near Split Rock Lake in LaSalle County, Illinois — 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 Split Rock 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 Illinois’s top lakes →
Follow Split Rock Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Split Rock Lake
Nearby Lakes in LaSalle County
Frequently asked questions about Split Rock Lake
Where is Split Rock Lake?
- Split Rock Lake is a lake in LaSalle County, Illinois. Its water-quality measurements are published by Illinois EPA and shown on this page as reported.
What is the water quality of Split Rock Lake?
- Split Rock Lake in LaSalle County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Surface area: 163 acres.
Is Split Rock Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Split Rock Lake across LakeQuality
More lakes in Illinois
Other Lakes in Illinois
Where this data comes from
Measurements for Split Rock Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.