You can do the Shimla, Narkanda, Rampur, Kufri, Chail section, or the Kangra, Dharamshala, Mcleodganj, Dalhousie section... many a times there is snow in the beginning of Feb
You can go to kheerganga trek from kalga , in Feb it's just opened its full of snow not a very hard or tough trek no extra equipment required and to reach kalga you first need to change bus from bhuntar then go to Manikaran then you need to take another taxi or bus to reach kalga.