Since the early 2000s there has been an increase in artists who are walking as an essential part of their artistic practice. This book identifies the unique attributes of walking to develop a definition for walking as an artistic medium. Drawing on historical sources, such as the walks of the Romantic poets, Dadaists and Letterist/Situationist Internationals, it presents a practice based approach to walking focused on the radical memory of the medium. The book covers three contemporary organisations working to develop the artistic medium of walking--London's Walking Artists Network, Scotland's Walking Institute and New York City's Walk Exchange--and looks at how these different organisation's strategies contribute to the development of the artistic medium of walking. The book is framed by five walking exercises, and invites the reader to create a memory palace for the medium of walking as a practical exploration of artistic walking practices.