Yes, you can walk the trails of the Cinque Terre in trainers (sneakers), provided they are high-quality athletic shoes with good tread. While professional hiking boots are not strictly necessary for the main "Blue Trail" (Sentiero Azzurro), standard fashion sneakers or flat-soled slip-ons are highly discouraged and, in some sections, actually prohibited by the National Park authorities for safety reasons. The paths are made of ancient, uneven stone, dirt, and steep stairs that can become very slippery after a light rain. If you wear trainers, ensure they have a firm grip and provide enough support for your arches, as you will be climbing hundreds of steps between villages like Vernazza and Corniglia. For 2026 travelers, "trail runners" are the perfect middle ground; they offer the lightness of a trainer with the rugged sole of a boot. Avoid brand-new shoes that aren't broken in, as the "vertical" nature of these trails is a recipe for blisters if your footwear isn't perfectly molded to your feet.