It also has county road extensions, one of which is between Fort White and Worthington Springs, and the other between Brooker and SR 100 north of Theressa.

Once the concurrency ends, CR 18 turns east again at the intersection of Hammock Road, and becomes Southeast Sebring Street.

Though the road isn't necessarily straight, CR 18 still runs relatively east and west, including when it uses a bridge over Interstate 75 with no access.

The surroundings of the route are primarily wooded with occasional breaks of private property, but then runs along the northeast shore of Hampton Lake.

Once it leaves the vicinity of the lake, County Road 18 is named Navarre Avenue and then has a major intersection with US 301 in Hampton.