Seemed you can check in from 12 noon if you need early check they will provide you as per the avaibility I suggest you to send them your name & reservation number & write you request Enjoy
I do believe it is 3 pm. If you are going off season, I am sure they will be able to accommodate you if you arrive earlier. You can always send them an email as they will respond quite fast.
Glacier Hotel Pokhara
Fax: +977 (0) 61 46 31 64
info (?) glacierboutique (?) com
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Get an answer from Glacier Hotel & Spa staff and past guests.