East Bay Regional Park District’s McCosker Sub-Area Creek Restoration and Recreational Improvements Project aimed to restore vital habitat for special-status species like rainbow trout and federal- and state-listed California red-legged frog while enhancing recreational opportunities for the public. Active construction on the project spanned from 2020 to 2023, and involved a comprehensive restoration effort, including the daylighting of a once-buried creek through culvert removal, construction of two creek channels (Alder and Leatherwood Creek), and installation of in-stream habitat features and riparian plantings. Preliminary post-construction observations revealed promising outcomes. The once-fragmented habitat saw the immediate return of rainbow trout, indicating improved habitat connectivity and ecological conditions. Approximately 2,000 healthy riparian plantings have thrived, contributing to the restoration of the habitat and enhancing its overall ecological value. These habitat improvements have also led to increased native vegetation cover, providing important resources for native wildlife such as nesting birds and the San Francisco dusky-footed woodrat, a state species of special concern. This poster highlights the success of the McCosker Project in its initial post-construction monitoring stages, demonstrating its positive impact on both listed species and sensitive habitats, and emphasizing the importance of such ecological restoration initiatives for the community and the environment.