This left hand read billboard entering St. Charles County is located between 5th Street and Hwy. 94 exits just west of the St. Charles Convention Center. Bass Pro is located on the opposite side of I-70. St. Charles County has been one of the fastest-growing counties in the country for decades. Daily traffic jams for commuters to and from the affluent bedroom communities are the norm. Attractions in the vicinity: Ameristar Casino, Hollywood Casino, St. Charles Convention Center, Historic Main Street, Bass Pro, Dave & Busters, Hollywood Casino Amphitheater.