Illinois Beach State Park

Beginner

Family-friendly Field verified June 5, 2026

Day use
Freshwater

About this place

Illinois Beach State Park is a 4,160-acre park on Lake Michigan in Zion, Illinois — one of the last remaining natural lake beaches in the state and one of very few clothing-optional lake beaches in the Great Lakes region. The park preserves a mix of beach, dunes, swamp, and savanna, making it ecologically significant beyond the beach itself.

The clothing-optional area is in the South Beach section of the park, in a less-trafficked stretch of the shoreline. Lake Michigan water is cold — averaging 65–70°F in July and August at this latitude — but the beach is wide and sandy, and the Great Lakes provide a fresh-water beach experience with no jellyfish, no salt, and strong swimming conditions when the wind is calm. The lake has no tidal variation but significant wave action from wind; the shallow near-shore warms quickly on calm days.

The park is in Zion, about 40 miles north of downtown Chicago and 10 miles south of the Wisconsin border. It's accessible by car via Route 41 and by Metra North Line commuter rail to the Zion station, making it a viable Chicago day trip.

Visitor notes

Contributed by ClothingOptional.org Editorial Team

Who visits

Chicago metro day-trippers, Lake County naturists, Great Lakes region visitors who know C/O lake beach options are rare. Metra-accessible from Chicago, which brings a more diverse crowd than car-dependent parks.

How to find it

Drive Route 41 north to Zion; follow Wadsworth Road east to Lakefront Drive and the park entrance. Alternatively, take Metra North Line to Zion station and bike or take a rideshare to the park. C/O section is in the South Beach area — follow the beach south from the main parking area.

Things to watch out for

Lake Michigan can develop large waves quickly in wind events; check conditions. The park charges a vehicle entry fee. C/O tradition is informal; Illinois state park rules technically prohibit nudity, but South Beach has a longstanding exception in practice.

Last updated 2026-06-05

Etiquette & ground rules

C/O section is South Beach. The park has standard family beach areas nearby — walk far enough south to be in the informal zone. Low-key behavior expected.

Know this spot?

Report an update

Beach closed? Parking price changed? Section moved? Send a short note and we'll check it.

Also in Illinois

More places nearby

Club

Illinois, USA

Blue Lake, Inc

Blue Lake sits in northwestern Illinois near Erie, about 30 miles east of the Quad Cities. It's a member-owned cooperative that's been running since the 1950s, making it one of the older continuously operating naturist clubs in the Midwest. Like many co-ops of its era, it was founded by families looking for a private, informal place to practice social nudity away from public scrutiny—a model that shaped much of the American naturist landscape when commercial resorts were rare and public nude recreation essentially nonexistent. The property centers on a small private lake suitable for swimming and paddling, surrounded by wooded areas and open lawn spaces. The atmosphere is low-key and community-oriented rather than resort-like. You'll find people swimming, playing volleyball, reading in the shade, or just hanging out by the water. Facilities are basic: restrooms, showers, and a clubhouse. This isn't a place with amenities like a restaurant or spa—it's more rustic and DIY, reflecting its cooperative roots where members pitch in to maintain the grounds. Blue Lake is family-oriented, especially during summer months when kids are common. First-time visitors need to contact the club ahead of time rather than just showing up. As a co-op, it operates differently than commercial clubs—membership structures and guest policies reflect a community-focused model where regulars know each other and help run the place.