Some of the popular treks are:

Kedarnath - Vasukital trek
Region: Gharwal / Uttaranchal
Grade: Moderate
Duration: 6 / 8 day.
Highlights:
- The temple of Kedarnath
- View of Chaukhambha peaks and Mandakini valley
Panch Kedarnath trek
Region: Gharwal / Uttaranchal
Grade: Moderate - High altitude
Duration: 3 / 15 day.
Highlights:
- Visit the 5 kedar shrines.
- View of chopta valley often called mini Switzerland.
- The trek can be done on foot as well as in a vehicle.
Valley of flowers
Region: Gharwal / Uttaranchal
Grade: Easy
Duration: 8 / 12 day.
Highlights:
- Valley of flowers.
- Visit to Josi math.
- Visit to Hemkund Saheb (Optional).
Har-Ki-Doon
Region: Gharwal / Uttaranchal
Grade: Easy
Duration: 9 / 12 day.
Highlights:
- Hanging valley of Gods.
- Least explored reagion of Gharwal.
- View of Swargarohini Peak.
- Trek through Govind Pashu Vihar (Wildlife spotting).
- Temple dedicated to Duryodhana (Eldest Kaurava brother) in Osla.
Binsar trek
Region: Gharwal / Uttaranchal
Grade: Easy
Duration: 7 / 9 day.
Highlights:
- From Piersain and Binsar a panoramic view of the stately Gharwal Himalayan peaks.
- Trek through rich forests of deodar (alpine trees).
Pindari Glacier
Region: Kumaon (Uttranchal)
Grade: Moderate - High altitude
Duration: 7 / 8 day.
Highlights:
- The most easily accessible glacier in the Kumaon region.
- View of Nanda devi and Nada Kot peaks.
- Partial trekking through the alpine region.
Kafni Glacier
Region: Kumaon (Uttranchal)
Grade: Moderate / Difficult
Duration: 9 / 12 day.
Highlights:
- Trek through Pindar valley.
- View of Nanda devi, Nanda kot and Nanda bhanar.
Likir to Temisgam Region: Ladakh
Grade: Easy / Moderate
Duration: 5 / 6 day.
Highlights:
- One of the easires treks in Ladakh.
- Visit Likir Monastry which now belongs to Dalai lama's younger brother Ngari Rimpoche.
Lamayuru Padum Trek Region: Ladakh
Grade: Difficult
Duration: 15 / 18 day.
Highlights:
- Visit Thikse, Shey and Hemis.
- Visit Pepiting & Karsha Gompa monastery.
Jim Corbet NP
Region: Uttranchal
Grade: Easy
Duration: Days at will
Highlights:
- Wild life sighting.
- Maximum concentration of tiger population.
- The first national park to be declared in the country.
Kaziranga NP
Region: Assam
Grade: Easy
Duration: 7 / 10 days
Highlights:
- The only place with the presence of single horn Asiatic Rhino.
- Elephant safari.
Sundarbans
Region: West Bengal
Grade: Easy
Duration: 3 / 15 days
Highlights:
- The Royal Bengal Tiger.
- Traveling through the biggest delta in the world.
- Stay in core jungle in boats.
- Boat safari.
Singalila NP Safari
Region: West Bengal
Grade: Easy
Duration: 5 days
Highlights:
- Jeep Safari.
- A view of the Everest and the Kanchenjungha ranges.
- The only place in the world from where you can see 4 of the 5 highest peaks of the world namely Everest, Kanchenjunga, Makalu and Lhotshe.
Singalila NP Trek
Region: West Bengal
Grade: Difficult
Duration: 7 / 15 days
Highlights:
- Sighting of the read panda (highly endangered species)
- A view of the Everest and the Kanchenjungha ranges.
- The only place in the world from where you can see 4 of the 5 highest peaks of the world namely Everest, Kanchenjunga, Makalu and Lhotshe.
Dzongri / Goechala Region: West Sikkim
Grade: Moderate / Difficult
Duration: 10 / 15 days
Highlights:
- In close proximity with the sacred Kanchenjunga.
- Sighting of a vergin peak Pandim.
- Sighting of the most beautiful peak of the world due to its near symetrical shape i.e. Shiniolchu.
- Visiting the first capital of Sikkim, Yuksom.
- The oldest Monastery - Dubdi.
Robongla to Mainam Region: West Sikkim
Grade: Moderate / Difficult
Duration: 4 days
Highlights:
- In close proximity with the sacred Kanchenjunga.
Hilley, Varsay, Dentam, Uttaray Region: West Sikkim
Grade: Easy / Moderate
Duration: 6 / 9 days
Highlights:
- Place is famous for diverse variety of flowers
Peling, Khecheopalri, Yuksom, Rabongla Region: West Sikkim
Grade: Easy / Moderate
Duration: 6 / 9 days
Highlights:
- The main Monasteries of Sikkim.
- The second highest waterfalls of the country namely Kanchenjunga and the holy khecheopalri lake.