During the Pleistocene and into the Holocene epochs, an alpine glacier originating from the southwest in the Stuart Range made its way to where the town is today. Leavenworth sits on the terminal moraine of that glacier and has many glacial erratics that originated 20 miles up the Icicle Valley near Mount Stuart.
Hear me, O Lord, hear me, that this people may know that thou art the Lord God, and that thou hast turned their heart back again. 1 Kings 18:37 KJV