2BR 1Ba, 806ft2 Everyday is an Open House: M-F 8: 30am-5: 00pm Price Range for this floorplan: $840-$905 Located in beautiful northern Billings, on the cusp of the famous Rim Rock, Castlerock Apartment Homes offer quality living in one of the 48QN8H most picturesque settings of the city. The pool, hot-tub, and exercise room were all designed with your stress-free living in mind. And at Castlerock Apartment Homes, your pets are more than welcome.