This chapter responds to the theme of this collection by offering an exploration of eighteenth- and nineteenth-century representations of the sands of Morecambe Bay. Weaving together works of fiction and literary nonfiction, I consider the recurrent portrayal of Morecambe Bay as a threshold and a frontier. Specifically, I examine the reiteration of this conception of the Bay in the works of William Wordsworth, Ann Radcliffe, Edwin Waugh and others. Collectively, these accounts bear witness to a period of remarkable change in human encounters with Morecambe Bay that took place over the course of the nineteenth century. They offer insights into how the extension of a railway around the bay during the 1850s altered the way people experienced, understood, and represented the passage over the sands.