Hiking and trekking are similar activities, but there are some differences.Hiking is walking on shorter well-marked trails that take less than a day. Most trails are near popular areas (like cities and parks).Trekking is a long hike through rugged backcountry terrain that takes a few days or more to complete. While there may be trails, most treks are deep in the wilderness without marked paths or camping facilities.According to the dictionary, trekking is slightly more demanding than hiking.