World's largest wildlife crossing is on track to open this winter — unless El Niño intervenes — slide 1 of 6

World's largest wildlife crossing is on track to open this winter — unless El Niño intervenes — slide 2 of 6

World's largest wildlife crossing is on track to open this winter — unless El Niño intervenes — slide 3 of 6

World's largest wildlife crossing is on track to open this winter — unless El Niño intervenes — slide 4 of 6

World's largest wildlife crossing is on track to open this winter — unless El Niño intervenes — slide 5 of 6

1 / 6

World's largest wildlife crossing is on track to open this winter — unless El Niño intervenes

October 14, 2026

The world's largest wildlife crossing over the 101 Freeway in Agoura Hills is set to open Dec. 2, pending weather delays. The $114 million project aims to reconnect isolated mountain lions in the Santa Monica Mountains, threatened by inbreeding, with populations in the Simi Hills. Construction challenges include compacting clay-rich soil, which becomes slick when wet, potentially delaying completion. The crossing is expected to improve genetic diversity and species survival.

Which Homes Can You Afford?

See Your Options

How Much Is Your Home Worth?

Find My Home Value