Castle Hill is a heritage-listed isolated pink granite monolith in the suburb of Castle Hill, City of Townsville, Queensland, Australia. It rises to a height of some 286 metres above sea level and dominates the city skyline. It is one of the most distinctive natural features on the Queensland coast. There are a number of vantage points from which to view the city below and also across Cleveland Bay to nearby Magnetic Island. Castle Hill (as a hill) was listed on the Queensland Heritage Register in 1993.