It is not certain where the town of Bethpeor was located, other than that it was on the east side of the Jordan. It is probably the same as Baalpeor (4.3), perhaps opposite Jericho.
Quoted with permission from Bratcher, Robert G. and Hatton, Howard A. A Handbook on Deuteronomy. (UBS Helps for Translators). New York: UBS, 2000. For this and other handbooks for translators see here .