 The main extensions include Mission Bay, which stretches to the north to the mouth of the Mission River, and Port Bay to the west, which forms the southern boundary of the Live Oak peninsula.The peninsula is located on the eastern shore of Copano Bay and is lined with beach homes and residences, which begin just west of the inlet Salt Lake to the head of Live Oak peninsula at the confluence of Copano and Aransas Bay.This opening is spanned by the Copano Bay Causeway and the Copano Bay Fishing Pier, which once served as the main crossing to the Lamar peninsula.