The term 'long walk' can be described by two crossword solutions: 'TREK' and 'HIKE'. Trekking is a long, arduous journey, usually involving multiple days of walking. It is often done in remote areas or through difficult terrain, and may involve camping overnight. Hiking is a form of walking, usually done for pleasure or exercise. It is typically done on trails or paths, and can range from short walks to multi-day treks.