The terms hiking and trekking are generally used interchangeably. But there is difference between the two. Trekking is long journey on foot in challenging environment usually on hilly and and mountaineous trails here no means of transport exists. Hiking, on the other hand, is walking in natural environment on pre-charted paths.
Himalayan ranges in both India and Nepal facilitate trekking trails and hiking.
Leh, Ldakh and Gulmarg in Kashmir both the trekking trails and hiking paths. Srinagar has the hiking paths besides roads. Kullu and Manali Hills in Himachal Pradesh have both trekking trails nesides hiking paths which generally lead to villages. However, Simla at lower hills have generally hiking paths with a few trekking trails. In Uttrakhand called Devbhumi (the land of gods), thousand of devotees gp trekking to the pilgrimages in preference to road transport.
In Rajasthan, tourist reach hiking the Jaisingh Hilltop fort on the hilly path while viewing the natural panorama and the walled city below. Hiking is involved to reach Hampi in Karnataka to sight ancient ruins of Hampi city, a World Heritage Site on rocky spot surrounded by green forest and to forts in Pune and khandala hills. Kodaikanal in Tamil Nadu located at Palani hills is also a spot for hiking.
In Nepal, you can enter Gateway to Mt. Everest at Namcha Bazzar and trek aimlessly till you get tired. Besides, there are unlimited spots for both trekking and hiking in Nepal.