What is the northern border of the RSJ Catchment Zone?

The northern border of the RSJ Catchment Zone is determined by its geographic and hydrological boundaries, which include significant natural landmarks. San Francisco Bay is a major geographic feature in the area and serves as a clear northern limit for the RSJ Catchment Zone. This designation is important because catchment zones are defined based on the flow of water and rainwater drainage, and being adjacent to a large body of water like the San Francisco Bay influences the hydrology and ecosystem of the area.

In comparison, while Highway 101, the South Bay region, and Monterey Highway are notable features of the landscape in Santa Clara County, they do not act as the northernmost boundary for the RSJ Catchment Zone. Highway 101 runs along a different trajectory that does not align with the zone's northern limit, and the South Bay refers more broadly to the region south of the San Francisco Peninsula, while Monterey Highway is a significant route but not a geographic boundary in the context of the catchment zone.