Easy : -
Gentle trekking for beginners and physically fit. Not too steep gradients. Altitude does not go above 3500m, 4 -5 hours of walking.
Moderate : -
Good physical condition, 4 – 6/7 hours of walking. Highest camping will not exceed 4500m. Varied trails – gentle to steep ascents and descents.
Strenuous : -
Good physical condition, crossing high passes upto 5400m, mixed terrain with walking on boulders, glaciers, steep ascents and descents, long walking hours upto 8 – 9 hours.
Challenging : -
Excellent physical condition, camping at about 5000m, glacier crossing, high altitude passes, demanding – walking for upto 9 hours, more than 2 weeks walking.