The Tampa Northern Railroad was a historic railroad line running from just east of downtown Tampa north to the city of Brooksville in Hernando County. The line continues to operate today and is under the ownership of the CSX Corporation, who operates it as their Brooksville Subdivision north of Sulphur Springs and part of their Clearwater Subdivision south of there.

The Tampa and Gulf Coast Railroad (T&G) was a railroad company in the Tampa Bay Area of Florida in the United States. It initially built and operated a line that ran from the Tampa Northern Railroad main line in Lutz west to Tarpon Springs and into Pasco County. Additional track starting from Sulphur Springs running west towards Clearwater and south to St. Petersburg was built shortly after. The railroad was informally known as the "Tug n' Grunt" and the "Pea Vine" due to its frequent twists and turns. While it was the second railroad to serve St. Petersburg and Clearwater after the Orange Belt Railway, it had the advantage of being the first to connect the area directly with Tampa.