Hey,
Uttarakhand is a great place for solo travel in North India. The hill stations are ideal to enjoy some alone time as well as partake in different activities. Most importantly, the locals are generally welcoming and warm, which will allow you to have a safe and authentic experience. Some of the best places to visit in Uttarakhand are Rishikesh, Haridwar, Dehradun, Nainital, Mussoorie, Kausani, Almora, Binsar and Auli. Check out the following guide to plan your trip to Uttarakhand: https://www.tripoto.com/travel-guide/uttarakhand
Hope this helps!