Cougar Death Highlights Urgent Need for Wildlife Crossing

A mountain lion was found dead on the 101 Freeway, less than half a mile from the steel and concrete endoskeleton of the Wallis Annenberg Wildlife Crossing.

2 minute read

June 24, 2024, 10:00 AM PDT

By Clement Lau


Close-up of mountain lion in the Santa Monica Mountains, California.

A mountain lion in the Santa Monica Mountains, Southern California. | National Park Service, Public domain, via Wikimedia Commons / Wikimedia Commons

On June 15, 2024, a mountain lion was struck and killed on the 101 Freeway in Agoura Hills, less than half a mile from the under-construction Wallis Annenberg Wildlife Crossing. This incident underscores the necessity of the wildlife bridge, set to be completed by early 2026, which aims to provide a safe passage for animals across the freeway, reducing wildlife fatalities and supporting genetic diversity for species in the Santa Monica Mountains. Local officials and wildlife advocates expressed both heartbreak over the recent death and relief that the wildlife crossing is becoming a reality, emphasizing its critical role in preventing further losses.

The California Highway Patrol reported the fatal accident early in the morning, with the deceased lion later identified as an uncollared adult male by the California Department of Fish and Wildlife. Genetic samples were collected to learn more about the lion's origins. This tragic event, along with previous similar incidents, highlights the ongoing dangers faced by wildlife in the area and reinforces the importance of the crossing, which is designed to benefit a range of species, from mountain lions to monarch butterflies.

Construction of the Wallis Annenberg Wildlife Crossing is progressing, with current efforts focused on building vegetated sound walls and preparing the bridge for soil and plant integration by the end of the year. The project, costing $92 million, will also extend over Agoura Road and include fire-safe utility relocations. Advocates hope the successful implementation of this crossing will inspire similar projects in other critical locations, addressing widespread wildlife movement challenges across busy roads.

Friday, June 21, 2024 in The Acorn

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Get top-rated, practical training

Close-up of "Apartment for rent" sign in red text on black background in front of blurred building

Trump Administration Could Effectively End Housing Voucher Program

Federal officials are eyeing major cuts to the Section 8 program that helps millions of low-income households pay rent.

April 21, 2025 - Housing Wire

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

April 30, 2025 - Diana Ionescu

Ken Jennings stands in front of Snohomish County Community Transit bus.

Ken Jennings Launches Transit Web Series

The Jeopardy champ wants you to ride public transit.

April 20, 2025 - Streetsblog USA

Close-up of white panel at top of school bus with "100% electric" black text.

Driving Equity and Clean Air: California Invests in Greener School Transportation

California has awarded $500 million to fund 1,000 zero-emission school buses and chargers for educational agencies as part of its effort to reduce pollution, improve student health, and accelerate the transition to clean transportation.

April 30 - California Air Resources Board

Aerial view of Freeway Park cap park over I-5 interstate freeway in Seattle, Washington at night.

Congress Moves to End Reconnecting Communities and Related Grants

The House Transportation and Infrastructure Committee moved to rescind funding for the Neighborhood Equity and Access program, which funds highway removals, freeway caps, transit projects, pedestrian infrastructure, and more.

April 30 - Streetsblog USA

"No Thru Traffic - Open Streets Restaurants" sign in New York City during Covid-19 pandemic.

From Throughway to Public Space: Taking Back the American Street

How the Covid-19 pandemic taught us new ways to reclaim city streets from cars.

April 30 - Next City