Amalickiah caused his army to pitch their tents "in the valley which was near the mount Antipas" (Alma 47:9). In the verses that follow, the following things happened between "the night" and "the dawn" that give us an idea of the distance between the camps and the height of the mount:
1. Amalickiah sends a "secret embassy" into the mount to ask Lehonti to come down--Lehonti refuses. Alma 47:10-11)
2. Amalickiah sends a second invitation--Lehonti refuses. (Alma 47:11)
3. Amalickiah sends a third invitation--Lehonti refuses. (Alma 47:11)
4. Amalickiah sends a fourth invitation. (Alma 47:12)
5. Lehonti comes down with his guards to Amalickiah who asks Lehonti to go back and have his army make a nighttime attack. (Alma 47:13)
6. Lehonti goes back and gets his army to come down and surround Amalickiah's men, who awoke "at dawn." (Alma 47:14)
Thus we might presume that Mount Antipas did not reach very high from the valley floor. [Alan C. Miner, Personal Notes]
[Alma 47:20]: To the Land of Nephi, to the City of Nephi:
It is hard to tell how far away mount Antipas was from the city of Nephi, however it was at least farther than the borders of the local land of Nephi because Amalickiah marched "to the land of Nephi" (Alma 47:20). The distance was signficant because when Amalickiah marched in to greet the king, the king was unaware of anything that had gone wrong with the original plans, even though there had been enough time after the surrender to administer poison "by degrees" (Alma 47:18) to Lehonti (thus allowing time to reach the king). [Alan C. Miner, Personal Notes]
Alma 47:22-24 When he had raised the first from the ground, behold he stabbed the king to the heart ([Illustration]): Amalickiah caused his servants to stab the Lamanite king in the heart. [W. Cleon Skousen, Treasures from the Book of Mormon, Vol. 3, p. 3115]
Geographical Theory Map: Alma 47:29-30 Servants of Lamanite King Flee to Melek (19th Year)