It leads from U.S. Route 98 in downtown Fort Walton Beach to just east of State Road 85 at the Eglin AFB West Gate where its southern section terminates.

The common name for the southern portion of the highway is Beal Parkway from its origin at U.S. Route 98 to its intersection with Green Acres Road.

At that junction the road becomes Lewis Turner Boulevard to its termination at the Eglin AFB gate.

The concurrency ends in Galliver, where CR 90 turns north and later ends at State Road 4 in Baker, thus becoming a hidden concurrency with SR 4 until it branches off to the north as a state highway.

The route begins in Holt at US 90 two blocks east of the west end of the concurrency with CR 189 as Main Street.