From the U.S. Highway site.
U.S.-98 goes through Florida, Alabama and Mississippi east to west and was established in 1933. It hugs the Gulf coast for much of its 902 miles.. Originally it ran just from Apalachicola to Pensacola. We drove it Wednesday from Apalachicola to Panama City Beach.
The eastern terminus is Palm Beach, Florida (West Palm Beach) and western is Bude, Mississippi, or Washington, Mississippi.