Two New Monument Expansions Safeguard Broader Landscapes

Newly enlarged area in Oregon addresses scientists' concerns.

Cal Coastal

California’s Lost Coast Headlands are some 280 miles north of San Francisco. Lost Coast’s northern point features rolling mountains and windswept coastal bluffs overlooking narrow beaches.

David Cooper

President Barack Obama has expanded two national monuments in California and Oregon—the California Coastal and Cascade-Siskiyou landscapes. Efforts to preserve lands and waters surrounding these two areas have been underway for years. The expansions, along with three Civil War, Reconstruction, and civil rights-era designations, were announced Jan. 12.

The California Coastal National Monument protects more than 1,100 miles of exposed reefs, rocks, and geological formations along an area that provides nesting habitat for an estimated 200,000 breeding seabirds a year, as well as thousands of marine mammals, including harbor seals and sea lions.

This national monument expansion will safeguard the ecological, cultural, and scenic resources of six sites totaling some 6,600 acres in Humboldt, Santa Cruz, San Luis Obispo, and Orange counties. The largest of these, the 5,800-acre Cotoni-Coast Dairies, encompasses six coastal watersheds and supports diverse vegetation that ranges from grasslands to redwood forests.

The Cascade-Siskiyou National Monument in southwestern Oregon is the only national monument explicitly designated to protect an area of outstanding biological diversity. The approximately 48,000-acre addition is home to rare and endangered species including the northern spotted owl and Oregon spotted frog, as well as natural communities found nowhere else on the planet. It is also a corridor or land bridge that facilitates the migration of plants and animals between the distinct areas. The area’s old-growth forests and clean, cold rivers provide key habitat for the region’s incredible variety of living creatures. 

However, as the population of nearby communities grows, there is great pressure for an increase in development and water resources, which affects the plants and animals within the existing monument boundaries. Changes in the region’s climate also affect these species, sometimes driving them beyond the protected area.  

Cascade Siskiyou

High-desert plants grow alongside meadow flowers and wetland species.

Alec Bryan, BLM

In 2011, an independent group of scientists evaluated the lands surrounding the Cascade-Siskiyou National Monument and recommended that its boundaries be expanded. They found that “without additional conservation investment, available scientific evidence suggests that some of the most valuable biological resources both within and immediately adjacent to the Monument are at high risk of irreversible degradation and loss.” Adding public land to the monument would conserve watersheds and help ensure protection for the area’s flora and fauna as they react to climate changes.

There was strong local support for expanding these monuments. In addition to the scientific community, supporters of Cascade-Siskiyou expansion included chambers of commerce, city councils, local elected officials, business owners, and Klamath tribes.  Champions of the expanded California Coastal National Monument include 16 chambers of commerce, 11 tourism boards, city councils, more than 100 community organizations, the group Latino Outdoors, the Amah Mutsun Tribal Band, the Northern Chumash Tribal Council, and the Trinidad Rancheria Tribal Council – for whom climate change and land stewardship traditions are very important.

Legislative efforts and time constraints, coupled with a changing climate, made safeguarding these landscapes a top priority. Fortunately, Congress assigned the president specific authority to designate national monuments through the 1906 Antiquities Act. Since then, nearly every president—eight Republicans and eight Democrats—has used the act to add to the nation’s conservation legacy. From the Statue of Liberty to the Grand Canyon, the Antiquities Act has been the tool used to preserve our nation’s natural, cultural, and historical legacies for future generations. From Alaska’s Denali National Park and Preserve to Maryland’s Harriet Tubman Underground Railroad National Historical Park, the act has created a living, breathing museum that enables us to share our nation’s history through firsthand experience.

More than 100 years after the act’s inception, we appreciate that President Obama has recognized that the landscapes of the California Coast and Oregon’s Cascade-Siskiyou region will benefit from additional safeguarding. And we look forward to the work future presidents may undertake to ensure that our nation’s most deserving natural places are set aside for generations to come.

Mike Matz is the director of The Pew Charitable Trusts public lands project. 

Spotlight on Mental Health

Composite image of modern city network communication concept

Learn the Basics of Broadband from Our Limited Series

Sign up for our four-week email course on Broadband Basics

Quick View

How does broadband internet reach our homes, phones, and tablets? What kind of infrastructure connects us all together? What are the major barriers to broadband access for American communities?

Pills illustration
Pills illustration

What Is Antibiotic Resistance—and How Can We Fight It?

Sign up for our four-week email series The Race Against Resistance.

Quick View

Antibiotic-resistant bacteria, also known as “superbugs,” are a major threat to modern medicine. But how does resistance work, and what can we do to slow the spread? Read personal stories, expert accounts, and more for the answers to those questions in our four-week email series: Slowing Superbugs.

Explore Pew’s new and improved
Fiscal 50 interactive

Your state's stats are more accessible than ever with our new and improved Fiscal 50 interactive:

  • Maps, trends, and customizable charts
  • 50-state rankings
  • Analysis of what it all means
  • Shareable graphics and downloadable data
  • Proven fiscal policy strategies


Welcome to the new Fiscal 50

Key changes include:

  • State pages that help you keep track of trends in your home state and provide national and regional context.
  • Interactive indicator pages with highly customizable and shareable data visualizations.
  • A Budget Threads feature that offers Pew’s read on the latest state fiscal news.

Learn more about the new and improved Fiscal 50.