Hiking itself shouldn't require much of a description, as it's essentially the act of walking in a non-urban environment. However, I will point out that trips listed here with the hiking/scrambling combination are likely hikes for the majority of their duration, but will include more difficult sections that could require as much as hands-on climbing (read through the descriptions for specific details). I also highly recommend the use of trekking poles while hiking. It's not just about stability; trekking poles are great for getting extra propulsion on flats and inclines, and for distributing impacts on descents. Learning how to use them properly will allow you to travel further, faster.