Castle Sol stands as one of the most formidable strongholds in Elden Ring, situated in the freezing reaches of the Mountaintops of the Giants. Exploring this northern fortress is essential for players seeking to access secret late-game areas and acquire powerful weapons. Navigating its narrow battlements and spectral defenders requires careful planning and a solid understanding of the terrain.

Finding Castle Sol in the Mountaintops

To reach Castle Sol, travel to the far northeastern region of the Mountaintops of the Giants. Players can head north from the Snow Valley Ruins Overlook Site of Grace and follow the path leading down toward the frozen valley. Continuing northeast past the optional Death Rite Bird boss encounter will bring the grand gates of the castle directly into view.

Navigating the Inner Courtyard and Lower Levels

Upon entering the main courtyard, adventurers are immediately confronted by fierce Lion Guardians guarding the grounds. It is best to draw these beasts out one at a time or sprint past them toward the wooden ladders along the wall. Moving along the ramparts allows players to bypass heavy resistance while collecting valuable upgrade items like Smithing Stones scattered on nearby corpses.

Reaching the Church of the Eclipse Checkpoint

Progressing through the upper walkways leads players directly inside the Church of the Eclipse, which houses a crucial Site of Grace. Resting here offers a safe baseline before attempting the final stretch toward the stronghold's main tower. Inside the chapel, players can also interact with a spectral NPC and pick up the Legendary Eclipse Shotel weapon from the altar.

Confronting Commander Niall and Securing Key Rewards

The final challenge of Castle Sol lies beyond the fog gate where Commander Niall awaits with his summoned spectral knights. Prioritizing his dual-sword knight quickly or utilizing spirit summons can help balance the initial phases of this difficult boss fight. Defeating Niall grants the left half of the Haligtree Secret Medallion, unlocking the path to the Consecrated Snowfield.