Easiest outings assume that the participants have no prior experience with the activity. A significant amount of the outing may be dedicated to teaching the activity. For example, on the easiest backpacking trips, particpiants will focus on proper gear selection and clothing, learning to pitch a tent, and respecting the environment. Covering many miles is unimportant, and the terrain is usually flat to gentling sloping. Easiest trips are usually one overnight or a daytrip.
The difficulty ratings are relative to the age and physical abilities of the particpants. For example, an elementary-aged youth will likely be challenged by a Level3 otuing, but Level3 may be a relatively easy outing for a high-school-aged youth.