Dean's quote about moms blogging gluten-free is a comical nod to Jared Padalecki's wife Gen, who has a mommy blog called Now & Gen.
Moriah is the name given to a mountainous region by the Book of Genesis, in which context it is the location of the sacrifice of Isaac. The Vulgate renders the location specified by God for the sacrifice as terram Visionis, traditionally rendered "land of Vision" in Catholic translations. Through association with the biblical Mount Moriah (the Temple Mount), Mount Moriah has traditionally been interpreted as the name of the specific mountain at which this occurred, although this identification is typically rejected by scholars.
Although it's never been shown on the show, Dean apparently must watch Jeopardy! (1984) every night, since Sam states that while no one on Earth can lie.