- Location
- California
- Current protection
- Santa Monica Mountains National Recreation Area, Verdugo Mountains, Simi Hills
- Status
- Expansion bill in Congress
- Tier
- Tier 3 · Smaller national site
- In the book
- Not featured in Undiscovered America
Why should it be a National Park?
Los Angeles is ringed by mountains, and the remarkable thing is how much of that ring is still empty. The Santa Monicas run to the sea. The Verdugos, the San Rafaels, the Simi Hills, the Santa Susanas, and the front range of the San Gabriels close the circle around the basin. From high ground in any of them you can see ten million people on one side and chaparral on the other. The Santa Monica Mountains National Recreation Area, created in 1978, protects part of this and is the largest urban National Park unit in the world. But it stops well short of the rim. The rest is a patchwork of county parks, conservancy holdings, city open space, and private land, and it has been disappearing steadily to development for fifty years.
This is also the closest thing in the country to a park for people who cannot get to one. Ten million people live within an hour of these hills, many of them in neighborhoods with almost no park space at all, and the corridor touches the San Fernando, Simi, Santa Clarita, and Crescenta valleys. The Interior Department's objection in 2019 was not about merit. It was that the Park Service already has more maintenance backlog than money, which is an argument about budgets rather than about whether the place deserves it.
The history of National Park Campaigns
Not a standalone park but a roughly 191,000-acre boundary expansion of Santa Monica Mountains National Recreation Area, the largest urban unit in the National Park System. Authorized for study in 2008, the NPS completed the special resource study in 2016 and found the expansion meets its criteria. Bills have followed repeatedly; the House has passed versions, but the Senate has never completed action.
Follow the bill on Congress.gov- Distinct National Park attempts
- 1 historical (the 1916 Sierra Madre National Park bill for the San Gabriels); today's bills are a boundary expansion
- Other designation attempts
- multiple expansion bills, 2017–2025
Sources
- NPS Rim of the Valley Corridor Special Resource Study (2016)
- DOI testimony on S. 774 (2019) and S. 1769 (2021)
- congress.gov, H.R. 3874 (119th Congress)
- PBS SoCal, "The Lost Plan to Create a National Park in L.A.'s Backyard" (2021)
- Wikipedia, List of proposed National Parks of the United States
- 1916
Rep. Charles H. Randall introduces legislation for a Sierra Madre National Park in the San Gabriel Mountains; despite local support, Stephen Mather dismisses it.
- 2008
Rep. Adam Schiff secures authorization for a Rim of the Valley Corridor special resource study.
- October 10, 2014
President Obama proclaims San Gabriel Mountains National Monument.
- February 2016
The NPS study recommends an expansion that would more than double the recreation area, reaching into the Simi Hills, Santa Susanas, Verdugos, and San Gabriels.
- 2017
H.R. 4086 (115th Congress), the first Rim of the Valley Corridor Preservation Act.
- June 19, 2019
DOI testifies against S. 774 on maintenance-backlog grounds.
- June 23, 2021
DOI supports S. 1769 with technical amendments.
- 2021–2022
The House passes the measure, including as an NDAA amendment; the Senate does not complete action.
- March 29, 2023
Reintroduced; H.R. 5881 (118th Congress) covers roughly 191,000 acres.
- May 2, 2024
President Biden expands the San Gabriel Mountains National Monument.
- June 10, 2025
Reintroduced in the 119th Congress as H.R. 3874 (Rep. Laura Friedman).
