Disclosed are various embodiments for loading a network site that uses a hierarchical site model. A computing device receives a request to generate a user interface associated with a network site. A caching process is initiated that caches data associated with the network site. A hierarchical site model is retrieved and processed to identify a subset of page models of the network site for generation of the user interface. Once it is determined that one of the subset of page models is stored in the cache, it is retrieved from the cache for generation of the user interface.