Salkah (סַלְכָה) is a city marking the northeastern boundary of Bashan — the territory of Og, king of Bashan, which was conquered by Moses and given to the tribe of Gad. It appears in Deuteronomy 3:10, Joshua 12:5, and 1 Chronicles 5:11 as a boundary marker. Its name may relate to the root meaning 'to go' or 'to proceed,' suggesting it was a city marking the limit of territory.
Boundary cities like Salkah are theologically significant as they mark the fulfillment of God's promises. When Moses lists the extent of Israel's conquest — 'from Arnon to Hermon, including all of Bashan as far as Salkah' — he is narrating the precision of God's fulfilled word. Every boundary marker in Deuteronomy and Joshua is a post driven into the ground of promise kept.
The defeat of Og, king of Bashan, was so remarkable that it became a refrain of Israel's covenant memory (Psalm 135:11; 136:20). Bashan, stretching to Salkah, was the territory of giants — the last remnant of the Rephaim. Its conquest proclaimed that no enemy, however fearsome, stands against the advance of God's promised inheritance.