Albert Barnes Commentary Numbers 20:22

"And they journeyed from Kadesh: and the children of Israel, even the whole congregation, came unto mount Hor." — Numbers 20:22 (ASV)

Mount Hor - The modern Jebel Harun, situated on the eastern side of the Arabah, and close to Petra. This striking mountain, rising on a dark red bare rock, to a height of near 5,000 feet above the Mediterranean, is remarkable far and near for its two summits, on one of which is still shown a small square building, crowned with a dome, called the Tomb of Aaron.