 | Very Easy | Likely to be a fire road or wide single track with a gentle gradient, smooth surface free of obstacles. | Beginner/novice cyclists with basic bike skills. | Most people in good health. |
 | Easy | Wide trail with gentle gradient and smooth surface. Some obstacles such as roots, logs and rocks. | Suitable for beginner mountain bike riders with basic riding skills and off-road bikes. | Most people in good health. |
 | Intermediate | A trail with moderate gradients, variable surface and obstacles. May include steep and slippery sections. | Suitable for skilled mountain bike riders only, with a reasonable level of fitness and basic off-road riding skills. | A good standard of health. |
 | Difficult | Expect large, dangerous and unavoidable obstacles and features. Challenging and variable trail with long, steep climbs or descents and loose surfaces. Some sections will be easier to walk. | Suitable only for experienced mountain bikers use to physically demanding routes. Navigation and personal survival skills are highly desirable. | Higher level of fitness. |
 | Extreme | Extremely difficult trails will incorporate very steep gradients, highly variable surfance and unavoidable, severe obstacles. | Suitable only for highly experienced mountain bike riders with excellent skills and quality mountain bikes. | Higher level of fitness. |