The final phase of the Wallis Annenberg Wildlife Crossing at Liberty Canyon is underway. What is soon to be the world’s largest wildlife crossing will connect open space on both sides of US Highway 101 in Agoura Hills. The project is expected to be completed by fall 2026, and can’t come soon enough for vulnerable species in the Santa Monica Mountains like mountain lions and Topanga’s new black bear family.
The first phase of construction, completed earlier this year, included over 26 million pounds of concrete, 82 bridge girders, vegetated sound walls, habitat rock features, and living soils to support native plant growth. Caltrans and partners laid 6,000 cubic yards of living soil across the bridge structure in preparation for planting this fall, which will include over 50 native species and restore the wildlife habitats both on the crossing and in surrounding open-space areas.
The final phase of the project includes extending the wildlife crossing over two-lane Agoura Road. The work involves significant earthmoving, restoration of natural hydrology, protection of heritage oak trees, and coordination with multiple agencies to relocate essential utilities along the freeway corridor.
On June 24, California Governor Gavin Newsom announced: “Today, the state is beginning the final phase of construction for what will soon be the largest urban wildlife crossing in the world—all thanks to the visionary work of state, federal, and private partners. The Wallis Annenberg Wildlife Crossing will soon protect Los Angeles’ native wildlife and over 300,000 drivers daily, as well as provide a cutting-edge model for urban wildlife conservation.”
