The Hogwarts boats are traditionally used to transport the first year students, accompanied by Hogwarts gamekeeper Hagrid across the Black Lake from Hogsmeade Station to the castle at the start of the school year. At the end of the school year, first years take the boats back across the lake to Hogsmeade Station. During the Hogwarts graduation ceremony, the seventh-years ride the boats back across the lake as they leave the school for the last time.