Har ki Dun Trek is graded as moderate, suitable for beginners and experienced trekkers alike. The trail spans over 46 kilometers, offering a mix of easy walks and challenging ascents. The initial stretch from Sankri to Taluka is a relatively easy walk, with gradual ascents. As you trek further, the trail becomes steeper, especially from Seema to Har ki Dun, requiring more effort and stamina. The altitude gain from Sankri (1950m) to Har ki Dun (3566m) is significant, demanding proper acclimatization. The terrain includes rocky paths, dense forests, and occasional river crossings, adding to the trek's challenge. Proper physical fitness and mental preparation are key to enjoying this trek.