This guidebook describes 30 day walks all over the Isles of Harris and Lewis, in the Outer Hebrides. The walks range from 2 and 14 miles (4 to 22km) in length, and are easily accessible from Stornaway or Tarbet. Routes vary from short strolls to long wilderness hikes, high-level and low-level, and include the An Cliseam horseshoe, visits to ancient historic monuments like the stone circles of Calanais and the famous Butt of Lewis lighthouse, all illustrated with OS 1:50,000 maps and dramatic photography. The routes take in most of the main summits as well as historical and geographical places of interest. A list of all the Marilyns (British hills of any height with a drop of at least 150m on all sides) on Harris, Lewis and St Kilda is included at the back. Tips are also included about walking on St Kilda, Berneray, Taransay, The Shiant Islands and The Flannan Isles, along with a short Gaelic glossary and route summary table, and advice on practicalities to make the most out of any walking trip on Harris and Lewis.