The mountain from which Moses viewed the promised land was Mount Nebo.
Deuteronomy 34:1-6 Then Moses went up from the plains of Moab to Mount Nebo, to the top of Pisgah, which is across from Jericho. And the LORD showed him all the land of Gilead as far as Dan, all Naphtali and the land of Ephraim and Manasseh, all the land of Judah as far as the Western Sea, the South, and the plain of the Valley of Jericho, the city of palm trees, as far as Zoar. Then the LORD said to him, "This is the land of which I swore to give Abraham, Isaac, and Jacob, saying, ‘I will give it to your descendants.’ I have caused you to see it with your eyes, but you shall not cross over there." So Moses the servant of the LORD died there in the land of Moab, according to the word of the LORD. And He buried him in a valley in the land of Moab, opposite Beth Peor; but no one knows his grave to this day.
I hope you have found this helpful.
May God bless you,