Preparing for a trek. The routes: North America - John Muir Trail, Kaibah Trail, Maroon Bells, Wind River Mountains, Long Trail, Great Divide, West Coast Trail; South America - Inca Trail, Cordillera, Huayhuash, Torres del Paine; Europe - West Highland Way, Coast to Coast, Northern Kungsleden, Tour du Mont Blanc, Stubai Horseshoe, Pyranean High Route, Pindos Horseshoe; Asia - Manaslu Circuit, Everest Trail.