Below the different grades shown in the chart are explained in more detail.
For Expeditions
Easy (E): Climb requires one-day climbs, or a multiday climbs with non-technical elements.
Moderate (M): Either a serious one-day climbs, or a multiday climbs with some technical elements. Requires an average level of physical fitness.
Difficult (D): Multiday climbs with some moderately technical elements. Requires an above average fitness level and high level of stamina.
Hard Difficult (HD): Multiday, Highly technical climb. Requires high level of physical fitness and stamina.
Very Difficult (VD): Multiday, Extremely technical climb. Requires very high level of Physical fitness and stamina.
For Trekking
Light: Light walking and generally level hiking that is good for most fitness levels. During these trips, hill-walking experience is desirable.
Moderate: Trek has various types of moderate to difficult terrain, including rough trails and normally 3 to 5 hours a day. Requires an average to above average fitness level.
Moderate+: High altitude treks above 3000 meters or in fairly difficult terrain- normally 4 to 6 hours a day. Requires an above average fitness level and high level of stamina.
Extreme: These high altitude treks or passes are known to be the most strenuous and has difficult terrain and conditions. These treks may require a degree of mountaineering skills and you capability of carrying on normally at an altitude of 4000-5600 meters. Daily walking is 5-8 hours approx.