State Road 87 is a north–south highway in the state of Florida that extends from U.S. Route 98 (US 98) to the Alabama state line where it becomes Alabama

Alabama

Alabama is a state located in the southeastern region of the United States. It is bordered by Tennessee to the north, Georgia to the east, Florida and the Gulf of Mexico to the south, and Mississippi to the west. Alabama ranks 30th in total land area and ranks second in the size of its inland...

 State Route 41. All of SR 87 is contained within Santa Rosa County

Santa Rosa County, Florida

Santa Rosa County is a county located in the U.S. state of Florida. According to the 2000 U.S. Census, the population was 117,743, while a July 1, 2005, estimate placed the population at 143,105, an 18% increase making it the 84th fastest growing county in the United States between 2000 and 2005. ...

 and consists of two noncontiguous sections:

• A 19.4-mile (31.2 km) section extending northward from US 98 at Navarre, Florida
  Navarre, Florida
  Navarre is an unincorporated community in Santa Rosa County in the Northwest Florida Panhandle. Navarre is about 25 miles east of Pensacola and about 15 miles west of Fort Walton Beach. The community is roughly centered on the junction of U.S. Route 98 and State Road 87...
  
   to US 90 just east of Milton, Florida
  Milton, Florida
  Milton , or Milltown, because Milton had the largest mill around) is a city in Santa Rosa County, Florida, United States. The city was incorporated in 1844 and is home to Naval Air Station Whiting Field. The population was 7,045 at the 2000 census. In 2004, the population recorded by the U.S...
  
  . This portion of SR 87 is marked as SR 87 South. On this stretch is passes through the western edge of the Eglin Air Force Base
  Eglin Air Force Base
  Eglin Air Force Base is a United States Air Force base located approximately 3 miles southwest of Valparaiso, Florida in Okaloosa County....
  
  training range.

• Another 30.4-mile (48.9 km) section from Milton, Florida northward to the Alabama state line. This portion of SR 87 is marked as SR 87 North. While within Milton city limits it is also referred to as Stewart Street.

SR 87 shares a 4.6-mile (7.4 km) east–west section of US 90 between the two segments.