Wikipedia
Ski touring is a form of skiing where both uphill and downhill travel are possible without needing to remove skis. Typically touring is done off- piste and outside of ski resorts. Tours can often extend over a period of more than one day. Typically, skis, bindings, and boots allow for free movement of the heel to enable a walking pace, as in Nordic, and unlike in alpine skiing. While ski mountaineering can be practised recreationally or as a competitive sport, touring is always recreational.
Ski touring and ski mountaineering have grown in popularity. It has been adopted by skiers looking for new snow, by alpinists, and by those seeking to avoid the high costs of traditional alpine skiing at resorts.
Touring involves independently navigating and route finding through potential avalanche terrain, and often requires familiarity with meteorology along with skiing skills. Ski touring can also be faster and easier than summer hiking in some terrain allowing for traverses and ascents that would be harder in the summer. Skis can also be used to access backcountry alpine climbing routes when snow is off the technical route, but still covers the hiking trail.
Usage examples of "ski touring".
There was no need to be burdened with clumsy ski boots, since one wore soft, easy boots for ski touring.