sentences:  Opelika lies in the southern reaches of the Piedmont Plateau, and straddles the divide between the Tallapoosa and the Chattahoochee river watersheds.The city is located along Interstate 85, which runs east of the city, with access from exits 58, 60, 62, 64, and 66.I-85 leads northeast 101 mi (163 km) to Atlanta and southwest 62 mi (100 km) to Montgomery.