Locally known as Tom Stuart Causeway, Welch Causeway, or Madeira Beach Causeway, the route crosses Boca Ciega Bay from Seminole to Madeira Beach.

in Bay Pines (originally built for the formerly proposed Pinellas Belt Expressway).

The southwestern terminus of the route is at State Road 699 in Madeira Beach, in front of the Ocean Sands hotel.

The entire route is in Pinellas County.

This Florida road-related article is a stub.