Uttarakhand is a popular destination for trekking and hiking due to its location in the Himalayan region. Here are some of the popular treks and hikes in Uttarakhand:

1. Roopkund Trek:

This is a challenging trek that takes you to a high-altitude glacial lake, known for its mysterious skeletons.

2. Valley of Flowers Trek:

This trek takes you through a beautiful valley filled with vibrant alpine flowers, and is a UNESCO World Heritage site.

3. Kedarkantha Trek:

This is a moderate trek that takes you to a beautiful summit that offers stunning views of the surrounding Himalayas.

4. Har Ki Dun Trek:

This trek takes you to a scenic valley known for its ancient villages and snow-capped peaks.

5. Dodital Trek:

This is a relatively easy trek that takes you to a serene lake surrounded by dense forests.

6. Nag Tibba Trek:

This is a moderate trek that takes you to a beautiful summit that offers panoramic views of the Himalayan range.

7. Tungnath and Chandrashila Trek:

This is a moderate trek that takes you to the highest Shiva temple in the world, and offers breathtaking views of the Himalayas.

8. Pindari Glacier Trek:

This is a moderate trek that takes you to a stunning glacier, and offers beautiful views of the surrounding peaks.

9. Rupin Pass Trek:

This is a challenging trek that takes you through beautiful forests, waterfalls, and meadows, and offers stunning views of the Himalayas.

10. Gaumukh Trek:

This is a challenging trek that takes you to the source of the river Ganges, and offers beautiful views of the Bhagirathi peaks.