St. Louis West / Historic Route 66 KOA Holiday is a campground located in Eureka, Missouri, offering a range of accommodations from tent sites to deluxe cabins. It features amenities such as a pool, jumping pillow, basketball courts, and planned activities, making it family-friendly. The campground also provides conveniences like full hookups, clean facilities, and a store, while being conveniently located near attractions such as Six Flags and St. Louis.