How do you hide specific or certain calendars in the Mavericks Calendars (iCal) App?
Follow this procedure:


Launch the calendars app
The default view when first setup hides the calendar listing pane. I am not sure if previous versions hid it by default also.
Click View --> Show Calendar List
A list of all calendars tied to your accounts will appear. Each calendar name has a checkbox next to it.  Just uncheck the ones that you do not want to display. 


 

Also you might see some duplicate entries - for example in holidays.  One way this can occur is if you have a Google Holidays calendar and you also have the Apple Holiday calendar checked - you will see both. Just uncheck one of them to fix this.