To them, bush, trees and intimate narrow tracks are important parts of the experience. For these people, the surroundings are much more important and it is unrealistic to expect them to use only tracks that motor vehicles can travel on or which run through exotic forested areas. Narrow bushed tracks provide a pleasant environment which challenges better riders. This type of pattern was apparent in Watson et al . Steep boulder-strewn mountain trails are still the domain of the horse and hiker.
Deep sand is nearly impossible to negotiate on a bike, as are swamps, bogs and wet meadows.
It is likely that the difficulty of the tracks will act as a filter of the type of mountain bike rider present. It isn't enjoyable. Mountain bike riders have indicated preference for a variety of riding conditions and settings. They would appear to be as diverse a group as are people who walk outdoors for pleasure. However, to date there have been no more definitive profile categories proposed for mountain biking.