Pikes Peak was formed over billions of years through geological processes including batholith creation, sediment deposition, uplift, erosion, and glacial movement. Magma intruded the earth's crust and cooled to form granite, which was later covered by sediment deposited in a shallow sea. The sediment was uplifted to form the ancestral Rocky Mountains, exposing the granite of Pikes Peak. Glacial erosion sculpted and carved the granite into the distinctive shape of Pikes Peak seen today.