2022 Map of Mission Bay

About this map

Mission Bay and the coastal marshes of Refugio County define this corner of the Texas Gulf Coast, where the Mission River empties into a network of bays and inlets. The landscape is dominated by a complex hydrology of tidewater and freshwater mixing, evidenced by the brackish reaches of Mission Lake and the broader expanse of Copano Bay to the south. Historically significant water sources such as Hynes Springs and the winding Melon Cr feed into this system, creating a delta environment that has long dictated the layout of local infrastructure. To the west, the land rises slightly into a grid of rural roads and family-named routes, including Ermis Rd and Boenig Rd. These pathways, alongside the corridor of Mision River Rd, connect scattered homesteads and pastures to the marshes, tracing the agricultural and ranching heritage of the coastal prairie.