Tirreno–Adriatico, the "Race of the Two Seas", is an elite cycle race following a route between the Tyrrhenian and Adriatic coasts of Italy. Traditionally held in the early part of the season, it is considered to be an important preparation for the Milan – San Remo classic road race. From 2005 to 2007, it was part of the UCI ProTour calendar, and was reclassified in 2008 as a UCI Europe Tour event, when organiser RCS withdrew all their events from the UCI's premier calendar. It became part of the UCI World Ranking calendar the following year.
First held in 1966, the race was held over three stages, which became five from the second edition in 1967 through to 1984. Since 1984 the race has consisted of six, seven or eight stages; since 2002 it is held over seven stages. From the second edition in 1967, the race has always finished in San Benedetto del Tronto.
Though a recent creation (it was introduced in 2010), the race's current trophy is one of the most recognizable in professional cycling.
Owing to the event's coast to coast format, the champion is presented with a large golden trident, the weapon associated with the Roman god of the sea, Neptune. It is officially named the Sea Master Trophy.
In the days preceding the race, the trophy is ceremonially raised from the Tyrrhenian Sea by divers of the Italian Coast Guard.
In keeping with the marine theme, the general classification jersey is blue.