San Gabriel Mountains National Monument
Stand · Find your defenders

Who’s defending the San Gabriel Mountains?

4 groups have it in their care

National monument in California, 346,177 acres, managed by the U.S. Forest Service, designated in 2014.

The defenders

The groups doing the most work here

4 groups are on the record for San Gabriel Mountains, each tied to it by a source our editors read, in the order they carry the weight. Give directly; nothing routes through us.

On the ground

Also in the fight

18 more work nearby but are not tied to San Gabriel Mountains on the record

The situation

What’s happening to San Gabriel Mountains

The backyard wilderness for 18 million people. The San Gabriels provide drinking water, clean air, and the only accessible wildlands for some of the most underserved communities in Los Angeles County. Reducing this monument would be an environmental justice catastrophe for communities that have nowhere else to go.

  1. 2014Designated as national monument by President Obama
Monument under review

Source: Department of Interior

No public comment window is open on San Gabriel Mountains right now. A call script is ready on the Public Lands Action Network, and the groups above are how the fight gets funded and argued in the meantime.

Your move

How to stand for the San Gabriel Mountains

Build my lineup around San Gabriel Mountains: the leading group here opens it, and the other seats fill from this record.

San Gabriel Mountains has defenders. It needs more.

4 groups on the record, The Wilderness Society with 178 staff + 32 volunteers. That is who is holding it. Find your way in.

Sources and methodThe situation, timeline, and threats: the MTJP threatened-lands record for San Gabriel Mountains, with per-item sources. Group crews and program ratios: IRS Form 990 via ProPublica Nonprofit Explorer, latest filed year, EINs on each group’s profile. Which groups are on the record for this place: MTJP editors tie a group to a fight only with a source link they have read, one link at a time. A group without one is shown as likely to care, a guess from the federal court record and the group’s own mission and footprint. Org-reported figures are always labeled. Data verified as of 2026-09-30. Nothing on this page is pay-to-play.