San Felipe Creek is a desert tributary stream flowing through Imperial and San Diego Counties in California before joining Carrizo Wash. This creek represents a unique and ecologically significant waterway in the desert landscape, distinguished by its role as designated critical habitat for the endangered desert pupfish. The creek flows through varying terrain from its headwaters through desert valleys before ultimately contributing to the Salton Sea watershed. San Felipe Creek is managed as an Ecological Reserve in Imperial County by the California Department of Fish and Wildlife, reflecting its importance for native species conservation. The creek's intermittent flows and harsh desert environment create specialized habitat conditions that support rare and adapted fish species.