Swimming Holes in Illinois

Swimming Holes in Illinois

Illinois is not a state with a long list of famous swimming holes, and we would rather be honest about that than pad this page with places that do not exist. The natural swimming worth seeking out is concentrated in the far south, where the forested ridges and hollows of the Shawnee National Forest create creeks, small lakes, and recreation-area beaches. Our directory currently tracks two swimming destinations in Illinois, both in the southern part of the state, and this guide covers them along with the seasons, hazards, and access details you should understand before you go.

If you are open to traveling, neighboring states offer more variety. The Ozarks in Missouri, the southern hill country of Indiana, the rivers of Kentucky, and the lakes of Wisconsin all add options within a reasonable drive of much of Illinois. You can also browse the full directory, find spots near you, or compare states from the states overview.

Illinois Swimming Holes

Both of our Illinois listings sit in the southern third of the state, near Carbondale, Murphysboro, and Harrisburg.

Shawnee National Forest Swimming Destinations

Shawnee National Forest Swimming Destinations covers the creek and lake swimming spots scattered across the Shawnee National Forest in southern Illinois. The standout here is Pounds Hollow Recreation Area, which has a designated swim beach on a small, scenic lake. As a developed recreation area on national forest land, Pounds Hollow is the closest thing Illinois has to an official, managed natural swimming spot, though that does not mean it is lifeguarded. Beyond Pounds Hollow, the forest holds quieter creek pools and lake shorelines that draw locals on hot days. Most national forest land is free to access, but some developed recreation areas may charge a day-use fee, so verify current conditions and fees with the U.S. Forest Service before you go.

Kincaid Lake Spillway

Kincaid Lake Spillway is an unofficial local swimming spot at the spillway below Kincaid Lake, in the Carbondale and Murphysboro area of southern Illinois. People wade and cool off in the flowing spillway water, and it is generally free to reach. Because it is unofficial and built around moving water, treat it with extra caution: spillways can produce strong, unpredictable currents, and conditions change quickly after rain. There are no lifeguards or managed safety features here.

Where to Swim by Region

Southern Illinois and the Shawnee National Forest

This is the heart of natural swimming in Illinois. The Shawnee National Forest spreads across the southern tip of the state, between the Mississippi and Ohio rivers, and its terrain of wooded hills and rock formations is unlike anything in the flat farmland farther north. Both of our listings are here: the Shawnee National Forest Swimming Destinations (including the Pounds Hollow beach) and the Kincaid Lake Spillway near Carbondale and Murphysboro. If you are planning an Illinois swimming trip, this is where to base yourself.

The rest of the state

Central and northern Illinois are dominated by agriculture, cities, and managed lakes, and our directory does not currently list natural swimming holes there. That does not mean none exist, but we would rather not invent entries. If you live in those regions, the spots above are a road trip, and the neighboring states linked at the top of this page may be closer than you expect.

When to Go

The reliable swimming season in Illinois runs from late May through early September, with July and August offering the warmest, most stable water. Spring runoff can leave creeks and spillways high and fast, while late summer often brings lower, calmer water. Southern Illinois summers are humid and warm, which makes the shaded creeks of the Shawnee especially appealing. Always check recent weather and water conditions before heading out, since both temperature and flow can shift within a few days.

Safety and Hazards

Your safety is your own responsibility at every spot on this page. Key hazards in Illinois:

• No lifeguards. Assume none of these locations are guarded, including the Pounds Hollow beach. Watch children closely and never swim alone.
• Spillways and currents. The Kincaid Lake Spillway involves moving water, which can be far stronger than it looks. Avoid spillways during or after high flow, and never put yourself where a current could pull you toward an outflow.
• Water quality after rain. Heavy rain can wash agricultural and urban runoff into creeks and lakes, raising bacteria levels and clouding the water. Wait a day or two after a storm before swimming.
• Submerged hazards. Natural water bodies hide logs, rocks, and uneven bottoms. Enter feet-first and never dive into water of unknown depth.
• Lightning. Summer thunderstorms can build fast. Leave the water at the first sign of lightning or thunder and wait it out under proper shelter.

A general note on quarries: Illinois has many former rock and gravel quarries, and they can be tempting on a hot day. Unmanaged quarries are dangerous, with frigid deep water, sudden drop-offs, and submerged debris. We do not list or endorse swimming at unmanaged quarries.

Access, Fees and Permits

Most national forest land is open and free to enter, but developed recreation areas within the Shawnee National Forest may charge a day-use fee, and fees and rules change from season to season. Confirm current costs, hours, and any closures directly with the U.S. Forest Service (Shawnee National Forest, fs.usda.gov) before your trip. The Kincaid Lake Spillway is an unofficial spot and is generally free, but because it is unofficial, access can change without notice. We do not have permit requirements on file for either location; always obey posted signs and respect any closures or restrictions you find on site.

For budget-conscious trips, see our budget and free swimming holes guide, and for help matching a spot to your season and comfort level, the seasonal and skill-level planner.

Frequently Asked Questions

Does Illinois have a lot of swimming holes?
No. Illinois is not known for natural swimming holes, and our directory tracks just two, both in the south. The state is mostly farmland and managed lakes; the natural swimming worth a trip is concentrated in the Shawnee National Forest. Neighboring states like Missouri, Indiana, and Kentucky offer more variety.

Where is the best place to swim outdoors in Illinois?
The far south, in and around the Shawnee National Forest. The Pounds Hollow Recreation Area has a designated swim beach on a small lake, making it the most established natural swimming spot in the state. The Shawnee National Forest Swimming Destinations listing covers it and other creek and lake spots nearby.

Is there a lifeguarded swim beach in Illinois's natural areas?
There is a designated swim beach at Pounds Hollow in the Shawnee National Forest, but you should not assume any lifeguard is on duty. Treat all the spots on this page as unguarded and swim within your limits.

Do I have to pay to swim in Illinois?
Often it is free, but not always. General national forest land is typically free, while developed recreation areas in the Shawnee may charge a day-use fee. The Kincaid Lake spillway is an unofficial, generally free spot. Verify current fees with the U.S. Forest Service before you go.

When is the best time to swim in Illinois?
Late May through early September, with the warmest and most stable water in July and August. Avoid swimming right after heavy rain, when water quality drops and creeks and spillways can run high and fast.

Is it safe to swim at the Kincaid Lake spillway?
It is an unofficial spot with moving water and no lifeguards, so swim with caution. Spillway currents can be deceptively strong, especially after rain or during high flow. Avoid the area when water is running high, and never let a current carry you toward an outflow.

Responsible Recreation and Leave No Trace

• Pack it in, pack it out. These spots have little or no trash service. Carry out everything you bring, including food scraps.
• Respect boundaries and signs. Obey closures and access restrictions, and do not trespass on private land to reach water.
• Protect water quality. Skip soaps and shampoos in natural water, and choose reef- and water-safe sunscreen.
• Tread lightly. Stay on established paths where possible, keep noise down, and give wildlife and other visitors plenty of space.