Great Wild Journey
Before you go

The national parks and the National Park Service

When you enter an American national park, you step into a system born more than a century ago from a simple, revolutionary idea: to protect the country's most extraordinary places so that they belong to everyone, including generations yet to come. Knowing this story helps you understand why every park has its own rules, its own rangers and its own way of welcoming visitors.

The birth of the National Park Service

The National Park Service was officially born on August 25, 1916, when President Woodrow Wilson signed the National Park Service Organic Act.

But the story of America's park system goes back several decades earlier.

The symbolic starting point is Yellowstone National Park, established by Congress on March 1, 1872. Yellowstone is generally considered the world's first national park: the revolutionary idea was to preserve a vast natural area so that it would remain open to the public, rather than being set aside for the private exploitation of its resources.

In the decades that followed, more parks and monuments were created, but there was still no single organization in charge of running them. Different areas might fall under the Department of the Interior, the War Department, the Forest Service or other federal bodies, and the result was patchwork management. Creating the NPS in 1916 was meant precisely to establish one federal organization dedicated to managing these areas in a coordinated way. When it was born, the new agency was responsible for about 35 parks and monuments managed by the Department of the Interior.

The philosophy behind the NPS

The most important part of the Organic Act is not simply the creation of the agency, but the definition of its mission.

The core principle can be summed up in two ideas:

  • preserve what makes a place special

  • allow the public to experience it and get to know it

The Organic Act states that the NPS must conserve the scenery, the natural and historic objects and the wildlife, while providing for the enjoyment of these places in such a way as to leave them unimpaired for future generations.

This twofold responsibility is key to understanding many of the rules travelers come across in the parks.

The NPS is not simply an organization whose job is to make each park as accessible as possible. Instead, it has to strike a balance between: protection → access → experience → conservation for the future

And it is exactly this balance that explains many of the seemingly counterintuitive restrictions I ran into while searching for the ideal route:

  • roads closed in winter;

  • timed or limited entry;

  • mandatory shuttles;

  • closed trails;

  • campgrounds with a limited number of sites;

  • no going off the marked paths;

  • permits required;

  • limits on cars;

  • temporary closures to protect wildlife or habitats.

These are not just obstacles to your visit: they are part of how the land is managed.

The NPS doesn't only manage "National Parks"

This is one of the most important things to know. In the United States, "National Park" is a specific designation, not a catch-all name for every area run by the National Park Service.

The National Park System actually includes many different categories. Among them: National Parks, National Monuments, National Historic Sites, National Historical Parks, National Memorials, National Recreation Areas, National Seashores, National Lakeshores, National Battlefields, National Preserves, National Reserves, and other designations.

Today the NPS manages 433 units of the National Park System, spread across all 50 states, the District of Columbia and the US territories, covering more than 85 million acres.

So when Americans talk loosely about "parks", they are often using a much broader term than what a European might picture as a "national park".

What does the National Park Service actually do?

I think it's very important for every traveller to know that behind a visit of just a few hours to a park lies an enormous amount of work.

Protecting nature. The NPS protects: forests; deserts; mountains; glaciers; coastlines; wetlands; rivers; lakes; marine ecosystems; wildlife; endangered species; habitats.

This also means monitoring how ecosystems change, controlling invasive species, managing wildfires, studying the effects of environmental change and protecting especially fragile habitats.

Preserving historic heritage. The NPS system also covers a huge part of American history. Its work therefore also includes: historic buildings; archaeological sites; fortifications; battlefields; historic villages; sites connected to Indigenous peoples; historic infrastructure; monuments; documents and collections.

The expansion of the NPS's historical role was especially significant in the 1930s. In 1933, an Executive Order transferred to the NPS many monuments and historic sites previously run by other federal agencies. It was a turning point that made the NPS a system no longer focused solely on nature and the landscapes of the West.

The role of the Park Rangers

One of the most iconic figures in the American system is the Park Ranger, who is much more than a kind of "park warden". Depending on their specialty and where they work, a ranger may handle: environmental interpretation; visitor education; safety; search and rescue; wildlife management; environmental protection; research; archaeology; historic preservation; trail management; fire control; emergency management; law enforcement. The first NPS rangers worked mainly in the great western parks and already had very wide-ranging responsibilities. As the system grew, the role became even more varied. For travelers, the ranger is often the most direct point of contact with the NPS.

The NPS and the visitor experience

As we have seen, conservation is not the NPS's only goal. The Organic Act also explicitly sets out the principle of public enjoyment: these places must be open for the public to discover, visit and appreciate, without compromising their integrity. This is where everything aimed at visitors comes from: visitor centers; maps; ranger programs; trail information; campgrounds; scenic drives; shuttles; viewpoints; museums; educational programs; safety information; reservation systems; permits for certain activities. The NPS says it shares the stories and values of the parks with more than 318 million visitors every year. This is one of the reasons why this guide explains the itinerary and gives general directions for each National Park, but encourages every traveller to spend time in the visitor centers and to fine-tune their visit to each park only after making the most of all the people and resources the NPS puts at your disposal.

Why can the rules vary so much from park to park?

A common mistake is to expect a single way of visiting that works for all 51 parks. In reality, every park is a different system. Here is a comparison, for example:

  • Death Valley: → main challenge: extreme heat, distances, water and road conditions.

  • Yellowstone: → main challenge: sheer size, wildlife, snow, altitude and seasonal closures.

  • Channel Islands: → main challenge: access by boat or plane and no road network on the islands.

  • Mammoth Cave: → the experience is closely tied to underground tours, and therefore to ticket availability.

  • Everglades: → a water-based ecosystem, with weather and seasons very different from those of the mountain parks.

  • Isle Royale: → especially tricky access, mostly by boat or seaplane, and a strongly seasonal park.

The NPS designation is what these places have in common, but the logistics of visiting them can be completely different.

The NPS as part of your travel infrastructure

For a trip like the Great Wild Journey, the NPS shouldn't be seen only as the agency that "looks after" your destinations. It is also a fundamental part of the itinerary's logistics. NPS information shapes many of the finer decisions about your stay. Beyond the questions of when to go, how long to stay and when the key scenic roads are open, which this guide already answers, the other details matter just as much for making the experience better: Which entrance should you use? It depends on how the park is laid out. Can you drive all the way through it? Not always. Do you need a reservation? Sometimes, yes. Do you need a shuttle? In some parks cars may be restricted, or may not be the best way to reach certain areas. Can you get there without a car? In some parks, yes; in others it is extremely difficult. That's why, when planning a great road trip, NPS information should be treated almost as design constraints for the project, not as mere tourist material.

The key idea: "preserving for future generations"

There is a phrase in the Organic Act that perfectly sums up the philosophy of the whole system: conserve these places without impairing their enjoyment by future generations. It is a principle that seems simple, but it is extremely important. The visitor is therefore not seen merely as a consumer of the landscape. They are part of a system in which:

the land → is protected → is visited → is understood → is respected → is handed down.

This also explains why visitor behavior is an integral part of conservation.

Staying on the trails, keeping your distance from animals, not picking up rocks or plants, leaving no trash and respecting closures are not just "park rules": they are the tools through which the principle of the Organic Act is put into practice.

A story that has been unfolding for more than a century

From the small federal agency of 1916, initially in charge of about 35 parks and monuments, the National Park Service has grown into a national system of more than 400 units, with responsibilities that span nature, history, culture, archaeology, education and national heritage. Its story can be traced through a few key dates:

Year Event
1872 Yellowstone is created, the first National Park in the United States
1906 Antiquities Act: the National Monument designation is born
1916 The National Park Service is officially born
1933 A major expansion of NPS responsibilities to include historic and military sites
1935 The Historic Sites Act strengthens the federal role in historic preservation
2016 The NPS celebrates its 100th anniversary (and Olson begins studying the route that will lead to this guide).
Today The National Park System includes 433 units and more than 85 million acres