Kelowna consists of ten sectors with within the sector boundaries. Central City is a linear commercial sector extending along Harvey Avenue from the Downtown to Highway 33. Major commercial developments include the Capri Centre mall, the Landmark buildings, and the Orchard Park Shopping Centre. Commercial activity is particularly concentrated along or very near highway 97 (Harvey). Dilworth Mountain is a relatively low and isolated mountain which is located near the geographic center of the city. It lies across from Knox Mountain to the West, and forms part of the eastern heights between which Glenmore Valley lies. While technically a mountain, it rises about one thousand feet or so above the rest of the Okanagan Valley (just over 2,000 feet elevation). It has been very extensively developed in recent years; decades of blasting and construction work have resulted in a scenic collection of neighborhoods with suburban character but located only minutes from Central City. Like many other Kelowna residential districts, Dilworth has gone from relative isolation and wilderness to hosting many residential roads with hundreds of homes, many of which are considered fairly expensive and high-end. Kelowna is the centre of the city and is a tourist district. It is located alongside Okanagan Lake, and its area is officially defined as all land north of highway 97, south of Clement Avenue, east of Okanagan Lake, and west of Richter Street. There are two main routes through the downtown core along which various attractions and commerce are concentrated. These include several parks and beaches along the lake, boardwalks and other walking trails, Kelowna Marina and Yacht Club, Delta Grand hotel and casino, and Prospera Place arena. The other main route through downtown is Bernard Avenue from Richter street to the lake. It has more shops and restaurants designed both for locals and tourists. Although Bernard Avenue continues east well past the downtown area, it is not part of downtown and is zoned residential. The commercial segment lies within its downtown section between Richter and Abbott streets, the latter of which is lake-adjacent. Kelowna has declared a downtown area to be a "red-zone", an area of prolific drug trafficking, assaults, and robberies. The red-zone extends from Okanagan Lake to the West, Lake Avenue, Rowcliffe to Ethel and Ethel to Stockwell, Doyle and back to the lake. The red zone in Kelowna was put in place in 1992 to reduce street crime, and within it the RCMP conducts an annual "spring sweep", arresting low-level drug dealers.