Camp Piasa is a group campground at Pere Marquette State Park in Grafton, Illinois, offering youth tent camping with picnic shelters, pit toilets, and drinking water at $2 per person per night (minimum $20/night).

The campground operates seasonally (May 27–October 16) and requires advance reservations through a lottery system, making it ideal for scout groups and organized youth outings.

Located near the Illinois River with access to hiking trails, boating, and fishing opportunities within the larger state park.