The Regional Open Space Strategy (ROSS) is a first iteration road map and action agenda. It is in no way exhaustive. It lays out fundamental initial steps toward unified, cohesive, regional open space conservation, but acknowledges there still exists gaps in information, collaboration, and coordination. In the ROSS, we put forward clear, concise objectives and specific on-the-ground, highly achievable strategies inclusive of the social, cultural, environmental values of communities. When fully implemented, the ROSS will deliver a connected, distinctive, well-managed open space network that will enhance the unique character of the region and enable Maricopa County to realize the full benefits of open space for people, environment, and economy. This is the 2019 update.