Mattress Firm The Promenade at Castle Rock is located in Castle Rock CO, Zip Code: 80108 on the street of 830 New Memphis Ct Unit 110. If you want to ask something about the furniture, mattresses, catalog, pricing, hours and directions, the Phone number is 303-660-8282. The coordinates that you can use in navigation applications to find Mattress Firm The Promenade at Castle Rock quickly are 39.41304 -104.87219 USA