Some of the ground belongs to all of us.
This page started with a bike path. For nine years, most of the important thinking I did, I did on the Schuylkill River Trail. I moved away in the summer of 2026, and trying to say plainly why a strip of public ground mattered so much sent me down a longer road, into who owns the land we walk on, why the answer is so different depending on where you stand, and what we quietly lose when the commons runs out.
Part 01 · A third place
The trail that held nine years
People talk a lot about third places, the spaces outside of home and work that anchor you to a community. Those conversations usually land on coffee shops, libraries, or community centers. The idea is that a life needs somewhere else, a place you return to often enough that it stops being a destination.
Mine was a trail. Over my years near Philadelphia I lived in three different homes, and every one of them sat within a half mile of the Schuylkill River Trail. I biked it, ran it, and walked it through graduate school, a postdoc, and the early years of raising a family. More than fifteen hundred times. More than ten thousand miles. Always the same river, always a little different.
What made it a third place was not the scenery. It was that it belonged to everyone, which meant it belonged to me. No membership, no gate, no one to ask. I could show up at six in the morning or nine at night and it was simply there, public, waiting.
Part 02 · Held in common
The lucky, radical idea of a commons
A public trail is a small piece of a much larger and stranger idea, that some land should be owned by no one in particular and open to everyone. We are so used to it that it is hard to see how unusual it is. Most of human history ran the other way. The land was the king's, or the lord's, or the company's, and your right to stand on it depended entirely on your relationship to whoever held it.
Public land inverts that. A national forest, a city park, a riverfront path. These are places where the normal logic of ownership is suspended, where a billionaire and a kid on a borrowed bike have exactly the same standing. That is rarer, and more fragile, than it looks.
A trail that belongs to everyone belongs to you. That is rarer than it sounds.
The catch is that the commons is handed out unevenly. Whether "go take a walk on public land" is an easy sentence or an absurd one depends enormously on where you happen to live. So I went looking for the map.
Part 03 · A lopsided map
The country is not divided evenly
Here is the contiguous United States, shaded by public land. Start with federal land, then add the states' own commons, or show both together; and measure it either as a share of each state or as acres per resident. Tap or hover a state for the full breakdown.
Federal acres from the Congressional Research Service (2018). State & local acres come from an older national inventory (c. 2000) and are approximate; New York is set to its ~4.9M acres of state land, excluding the private park inholdings that some tallies count.
The line is not subtle. In the West, the federal government owns the majority of entire states. More than 60 percent of Utah, Idaho, and Nevada. In the East it is a rounding error. Connecticut and Iowa sit at three tenths of one percent.
The reason is history, not landscape. As the United States pushed west, the federal government took enormous territories from the Native nations who already lived on them, by treaty, by purchase, and by force, including treaties it then went on to break. The arid, mountainous, hard-to-farm parts were never claimed by homesteaders or handed off to states, so they stayed federal, and over time became the national forests, parks, and BLM country that define the western map. The East had been carved into private hands long before that machinery existed. Texas, which kept its own public lands as a condition of joining the Union, is the exception that proves the rule, western in geography and eastern in ownership.
This is why the map has more than one layer. Switch it from federal to state & local and the East stops looking empty. States hold vast commons of their own, state forests, state parks, and wildlife and game lands, and that is often how the East assembles its public realm. Pennsylvania is barely two percent federal, yet it holds some 2.2 million acres of state forest and another 1.5 million of state game lands, many times its federal footprint. New York manages around 4.9 million acres of state land, including the roughly three-million-acre Adirondack and Catskill Forest Preserve, constitutionally "forever wild." Set the map to both and the real shape of the commons comes through, just differently owned and differently reached on each coast.
I have lived on both sides of this line, and the difference is real even where the map oversimplifies it. In Washington the commons is vast federal backcountry, where the backcountry starts more or less at the edge of town. Around Philadelphia it is a patchwork you stitch together yourself: A state park here, a county trail there, the riverfront path I lived on, every piece of it public, none of it the endless federal expanse of the West. Flip the view to acres per resident and the federal gap turns almost comic, fifty acres a head in Wyoming against a sliver of one in most of the East. The daily experience is gentler than that. Both places have a commons. They just hand it to you in different shapes.
Part 04 · The right to roam
Where are you allowed to walk?
Public land is the American answer to a question every country has to settle. It is not the only answer, and not the most generous. Some countries decided that access should not depend on ownership at all.
Below is an imagined valley, the same in every frame: A moor, a wood, some farmed fields, a river, a village. What changes is the law. Pick a country and watch where you are free to walk.
In Scotland, the Land Reform Act of 2003 gives you a right of responsible access to almost all land and inland water. Behave well, avoid gardens, growing crops, and people's privacy, and otherwise walk where you like. The Nordic countries have an even older version, allemansrätten, the everyman's right, a custom so deep it barely needs a statute: You may walk, camp a night, and pick berries on uncultivated land you do not own.
England and Wales went partway. The Countryside and Rights of Way Act of 2000 opened mapped mountain, moor, heath, and down, plus a dense web of ancient public footpaths, but left most of the countryside closed. An active "right to roam" movement is still pushing to widen it.
The United States went the other way entirely. Here, land is private by default and access is the exception. "Posted: No Trespassing" is the background condition; your right to walk runs out at the property line. What rescues it is precisely the public land on the map above, plus the hard-won easements and trails that let you reach it. It is a different bargain, and it puts more weight on the public land we do have.
And all four of these are versions of one fairly Northern European argument about ownership and access. Step outside that frame and the question changes shape. Across much of the world land has been held in common or by custom rather than by deed, governed by communities instead of titles. For Indigenous peoples on every continent, here included, land has been less a thing to be owned than a relationship to be kept, a way of belonging that the language of property barely touches. "Where am I allowed to walk" is a modern, Western way of asking something much older, which is how a people and a place come to belong to each other.
Part 05 · Open country
Going where the ground is open again
This week I am moving back to Washington. I am leaving a trail I love, and people near it I love more, and I have been trying to be honest about what I am actually returning to.
Part of it is this. I am moving from a place where the commons was scarce and precious to one where it is simply everywhere. From two percent to twenty-eight. My own small life is a data point on that lopsided map. The Schuylkill taught me how much a single public trail can hold, an entire decade of mornings, and the West is about to remind me what it feels like when that abundance is the baseline.
I do not think the lesson is that the West is rich and the East is poor. It is that wherever you live, the ground you are allowed to stand on freely is neither an accident nor a guarantee. Someone protected it, or fought to connect it, or simply decided it should belong to all of us. The trail held me for nine years because people I will never meet decided it should be there.
The takeaway
Three things I am carrying west
- Find your third place. The public one, the one with no gate. Use it until it becomes part of how you think.
- Notice who owns the ground. The freedom to walk is handed out unevenly, by history and by law, and it is easy to miss until it is gone.
- Defend the commons. A trail, a forest, a right of way. A thing that belongs to everyone only stays that way if everyone keeps deciding it should.
The ground is common. Go stand on it.
Keep walking
Go further
If any of this caught you, here is where to read more, find the public ground near you, and back the people working to protect and widen it.
Read & explore
- Federal Land Ownership: Overview and Data, the Congressional Research Service report behind this map.
- Native Land Digital, a map of whose land you are actually standing on.
- Right to Roam, the campaign to widen access in England & Wales.
- Scottish Outdoor Access Code, what a real right of responsible access looks like.
Find public land near you
- PAD-US Data Explorer, the USGS inventory of every public and protected acre.
- Protected Lands, a friendlier door into that same data.
- Recreation.gov, federal lands, permits, and campsites.
- TrailLink, rail-trails and greenways, from Rails-to-Trails.
- Your state's parks, forestry, and game agencies, which quietly hold most of the East's commons.
Groups doing the work
- Trust for Public Land, creating parks and protecting land for people.
- The Wilderness Society, defending America's public lands.
- Rails-to-Trails Conservancy, turning old rail beds into public trails.
- Backcountry Hunters & Anglers, public-land access from the sporting side.
- Outdoor Alliance, a coalition for human-powered recreation.
Sources & data. Federal land: Congressional Research Service, Federal Land Ownership: Overview and Data (2018). State & local land: National Wilderness Institute / Natural Resources Council of Maine inventory (c. 2000), approximate, with New York adjusted using NY DEC figures and Pennsylvania detail from PA DCNR and the Game Commission. Population: 2020 U.S. Census. Total land area: U.S. Census. Trail and home geometry: OpenStreetMap via the Overpass API, © OpenStreetMap contributors. Acreages are rounded, so percentages and per-resident figures are approximate; the walkable-valley percentages are illustrative.