Mount Ebal rises 2900 feet above sea level and is north of Shechem. It is near Mount Gerizim. In Deuteronomy 11:29, Moses tells the Israelites that when the Lord brings them into the promised land, a blessing shall be proclaimed from Mount Gerizim and a curse from Mount Ebal.
After Joshua conquered the city of Ai, he built an altar of boulders at Mount Ebal, and carved the 10 Commandments on the stones. Then all of the Israelites divided into two groups, half of them standing at the foot of Mount Gerizim and half at the foot of Mount Ebal. Between them stood the priests with the Ark.
The tribes of Reuben, Gad, Asher, Zebulun, Dan, and Naphtali stood at Mount Ebal, while the other six tribes stood at Mount Gerizim. Then Joshua read to them all of the statements of blessings and curses that Moses had written in the book of Gods laws. Every Commandment Moses had ever given was read before the entire assembly (Joshua 8:30-35).