If you loaded your card when you purchased your ticket online, you can go right to the hill. If you do not have a card, stop at any ticket office. You can view a map of the base area here: https://www.stowe.com/the-mountain/about-the-mountain/trail-maps.aspx?tc_1=2
If you purchased your pass or ticket in advance online, you have the option to use Mobile Pass and Lift Ticket through the My Epic app. This allows you to go straight to the lift using your phone as your pass or ticket. Please visit https://www.epicpass.com/app.aspx for more information about how to activate and use your Mobile Pass or ticket.