The valley of Gideon, named for the man Gideon who was slain by Nehor, was located on the east of the river Sidon across from the city of Zarahemla (Alma 1:8; 2:20; 6:7). In this valley a city was “built, which was called the city of Gideon” (Alma 6:7). The people of Nephi were able to cross the river Sidon from the city of Zarahemla and go directly “into the valley of Gideon,” implying this notable valley was positioned where it would converge with the course of the river Sidon (Alma 2:20; 6:7). Coming from the opposite side of the river, the people of Nephi, when fleeing in “haste” from the Amlicites, “took their tents, and departed out of the valley of Gideon towards their city, which was the city of Zarahemla,” and then proceeded to cross the river Sidon, again suggesting the valley of Gideon connected with the river Sidon (Alma 2:25–27).This implies the city of Zarahemla was located on the west of the river Sidon, and the city of Gideon, east of the river, within a valley of the same name, was near the city of Zarahemla. Any proposed location for the city of Zarahemla, we suggest, would require a valley for the city of Gideon on its east that directly converges with the course of the river Sidon flowing between them. This two-city alignment matches the towns of La Joya (Zarahemla) and San Ignacio (Gideon) in Baja California, which are located today on opposite sides of the Rio San Ignacio at its head (head of Sidon), with the town of San Ignacio positioned in a notable valley (Gideon).