Suitable for mountain bikers with mountain bikes. Single-track with gentle gradients, smooth to variable surfaces, and some avoidable obstacles such as rocks, roots and logs on the primary line.
Suitable for skilled mountain bikers with mountain bikes. Single-track with moderate gradients, some steep sections, and obstacles such as rocks, roots and logs on the primary line.
Suitable for experienced mountain bikers, used to physically demanding and challenging routes. Single-track, with steep climbs / descents, and dangerous unavoidable obstacles on variable and loose surfaces. Some sections will be easier to walk.
Suitable for highly experienced mountain bikers, used to physically demanding routes. All sections are challenging, with dangerous, unavoidable obstacles / features. Some extreme levels of exposure and/or risk. Some sections will be easier to walk.