Steel Force is a roller coaster at Dorney Park in Allentown, Pennsylvania. Built by D. H. Morgan Manufacturing and designed by Steve Okamoto, it opened in 1997. It is 5,600 feet (1,700 m) in length (over 1-mile (1.6 km)), making it the longest coaster on the East Coast. It has a 205-foot (62 m) first drop, with a top speed of 75 miles per hour (121 km/h).