This data belongs to the American people, who need to know what is being done to our National Parks. This administration is trying to use our public lands to erase history and undermine science.

Executive Order 14253 “Restoring Truth and Sanity to American History” and Secretary Order 3431 directed parks to censor any content “that inappropriately disparages Americans…or that emphasizes matters unrelated to the beauty, abundance, or grandeur” of natural features.

Why Are They Censoring Science and History?

Dismantling trusted sources of science and history makes their agenda of lies easier. Profiting from coal and oil is a lot easier if the impacts of fossil fuels are censored at sites like Muir Woods, Glacier, Acadia, and Everglades.

It’s easier to illegally detain people if we forget the true stories of Japanese-American incarceration in World War II, told at national park sites like Manzanar and Minidoka and Amache and Tule Lake and Honouliuli.

Propping up systemic racism is easier if you hide the evidence of the atrocities of chattel slavery, Jim Crow, and white nationalism at park sites like Medgar and Myrlie Evers Home, Cane River Creole, Rock Creek, and Independence Hall.

Most of all, they want to turn the American people against their national parks. They want to discredit the national parks and set the stage to privatize them.

Look at what they are censoring. Study it. Save it.
Find other people who care, and organize to fight back.
Build community around the science and history they want to erase.
And help us stop them.

Full About Page — sources, timeline, press coverage →
NPS Censorship Explainer → · Secretary’s Order 3431 →

Our Parks Need Your Voice

The Department of the Interior is removing and revising historical materials across the National Park System under Secretary's Order 3431. Congress has the power to stop this — but they need to hear from you.

443 park history entries with documented artifacts have been flagged, revised, or removed.

Momentum is building. On March 19, the NPCA and a coalition of historians, scientists, and park advocates filed for a preliminary injunction in federal court to halt the censorship. 53 House Democrats led by Rep. Jared Huffman are pushing to block funding for SO 3431. Add your voice to the pressure.

1. Find Your Reps

2. Review Letter

3. Send

Enter your ZIP code to find your representatives:

Your Representatives:

Your Message to Congress

Dear [Representative/Senator],

I am writing as your constituent to express my deep concern about Secretary's Order 3431 and its impact on the National Park Service's ability to tell the full story of American history.

As of today, 443 park history entries with documented artifacts across the country have been flagged for review, revised, or removed entirely. This includes interpretive materials, exhibit panels, films, publications, and waysides at parks from Gettysburg to Selma to Independence Hall.

Our national parks are America's classrooms. They preserve the stories of war, sacrifice, civil rights, and the complex journey that shaped our nation. Erasing or sanitizing this history does a disservice to every American who visits these sites seeking truth.

This fight is gaining momentum. On March 19, 2026, the National Parks Conservation Association and a broad coalition of historians, scientists, and advocates filed for a preliminary injunction in federal court to halt the censorship and restore removed materials. And 53 of your House colleagues, led by Rep. Jared Huffman, have already called on the Appropriations Committee to block funding for SO 3431's implementation. I am asking you to join them.

I urge you to act immediately:

1. Support legislation to defund and reverse Secretary's Order 3431
2. Demand full transparency from the Department of the Interior on every content change, removal, and revision
3. Protect the National Park Service's mandate to preserve and interpret our nation's heritage — free from political censorship

You can see the full, documented scope of what is being changed at MissingParkHistory.org.

This is not a partisan issue — it is about the integrity of our national heritage. Our parks' stories belong to all Americans, and your constituents are paying attention.

Sincerely,
[Your Name]
[Your Address]

Tip: Personalize your message — letters with personal stories are far more impactful. Mention a park you've visited or a story that matters to you.

Then paste it into each rep's contact form:

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📰 This Week in Park Censorship

Apr 15 – Apr 20, 2026 · 5 new developments

⚖️ 3 Court Rulings 🏛️ 17 Senators Demand Action 📖 NPS Censoring Books

Where the Fight Stands

The movement to stop NPS censorship reached a new inflection point this week. Seventeen senators, led by Edward Markey and Lisa Blunt Rochester, demanded FY 2027 appropriations language to defund Secretary’s Order 3431 — the most concrete legislative challenge to date. Meanwhile, the scope of censorship expanded beyond signs and exhibits: staff at Redwood National Park were caught flagging books about Native American history, including titles by Indigenous scholars.

On the legal front, courts continue to act as a check. The Third Circuit affirmed its stay preventing changes to the President’s House slavery exhibit in Philadelphia, while a court-enforceable settlement restored the Pride flag at Stonewall National Monument. But the administration is not backing down — it quietly posted proposed replacement panels for the President’s House that historians called “maliciously outrageous” in their sanitization of slavery.