Currently Being ModeratedDec 29, 2012 10:03 AM (in response to debsbarker)
open up iCal. Click the word "iCal" beside the apple, and select "preferences". Go to the accounts tab. You should see any calendars you subscribed to listed here. Select the one you don't want, and click the - sign in the bottom.
Currently Being ModeratedSep 25, 2013 10:01 AM (in response to debsbarker)
In your iPhone (or iPad) go to settings/general settings/Mail, Contacts, Calendars and at the top under "Accounts" you will see "Subscribed Calenars" (not in the calendar section, above that at the top of the page)... click on the calendar you want to delete and do so from there.