According to 2Chr 3:1, Moriah is Jerusalem, where King Solomon built the temple for the Lord.
Solomon began to build the house of the LORD in Jerusalem on Mount Moriah, where the LORD had appeared to his father David, at the place that David had designated, on the threshing floor of Ornan the Jebusite. (NRSV)
But the books of Chronicles, writings of the fourth century BCE during the Persian empire, were written to idealize the house of David and the southern Kingdom of Judah. Thus we should suspect the historical factuality of the Chronicler’s equating the location of Moriah with Jerusalem in 2 Chr 3:1, as the statement might have been intended to promote the Chronicler’s perspective.