Easy: Hikes up to 3 hours in length with 500 meters or less elevation gain.
Moderate: For hikers in reasonable condition. Daily stages of 6 hours or less, with up to 1,000 meters of elevation gain.
Difficult: For hikers in good physical condition. Daily stages up to 7 hours and an elevation gain up to 1,500 meters.
Extreme: Suitable for experienced trekkers in excellent physical shape. Daily stages up to 8 hours, substandard trails and/or elevation gain or loss up to 1,800 meters.