There are many places in especially Northern India from the trekking perspective. Here are a few famous treks - Hampta Pass, Valley of Flowers, Kedarkantha, Roopkind, Rupin Pass, Bhrigu Lake, Sandakphu, etc. It depends of the number of days and your endurance. You can choose a trek based on the season and difficulty level.
I have done a couple of treks in the Himalayas. You can refer the below links for further details.
https://trippingwithpraj.com/index.php/2019/12/01/hampta-pass-a-stunning-crossover-trek/
Hampta Pass Trek – A Stunning Crossover Trek - Tripping With ...
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Hello sonam are you planning to travel solo one of my travel buddy from the group went to rishkesh haridwar kedarnath last week .there were no regulations.where in india are you from sonam .are you a solo traveler.we have created travel buddy group from Mumbai Pune gujrat Hyderabad banglore delhi sikkim it's a mix age mix gender group are you interested in travelling and joining our group.
The best time to visit Udaipur is the winter season. The temperature remains comfortable and is apt for visiting the monuments and other places of interest in Udaipur. The best months to visit are September, October, November, December, February and March.