You hear the words mountaineering, trekking, and hiking used as if they were the same word all the time. The fact is, they’re similar – but very different. I guess they all involve walking outside. But there are some very important differences. If you’re considering taking an Adventure Tour with us, it’s very important to understand these differences. We want to make sure that what we offer meets your expectations. The best way to differentiate mountaineering, trekking, and hiking is to understand each activity’s degree of difficulty. Hiking Typically, hiking is considered to be the easiest of these three adventures.