How to Plan an Overland Trip Through South America

How to plan an overland trip through South America

An overland trip begins long before you turn the car's key. For whoever is thinking about the first time, planning seems like an intimidating task, so many countries, so many decisions, so many technical details. The good news is that overland planning is more about order than about quantity. Whoever follows a clear order discovers that big decisions unlock several small ones, and what seemed like a mountain becomes an executable list in a few weeks.

This guide is for whoever is starting from scratch. It applies to a short trip (2 to 3 weeks through Argentina) or a long trip (months crossing all of South America). The size changes, the order of the decisions doesn't.

In short: planning an overland trip has five steps in order: deciding the destination and duration, drawing the path, refining it with support points, sorting out the practical preparations (vehicle, documents, money, connectivity, health), and getting ready to use the app during the trip. Most people get stuck at the second step because they try to do everything on Google Maps looking road by road. There's a lighter way.

Step 1: Deciding the destination and duration

The first question isn't "where to?", it's "how much time do I have?". Time dictates the destination, not the other way around.

7 to 10 days, fits a border trip (all of Uruguay, northern Argentina from Foz/Posadas, Atacama leaving from northern Brazil). For whoever has never crossed a border by car, it's the ideal first-time format.

15 to 30 days, partial Argentine Patagonia, a loop around the vineyards (Mendoza plus Cuyo), Atacama plus southwest Bolivia, or a long itinerary within Brazil (Pantanal plus the Chapadas, the Estrada Real, the Caminhos do Sertão).

30 to 90 days, complete Argentine plus Chilean Patagonia, the whole Ruta 40 of Argentina, a loop through the five countries of the Prata basin, or a descent to Ushuaia with a return along the Pacific.

Over 90 days, a continental trip, with or without a planned return. Here the "destination" stops being a fixed point and becomes an open region.

Rule of thumb: underestimate how much you can see, overestimate how much you need to stop. Most beginners plan 1,000 km a day and discover in practice that they enjoy it more with 400-500. On an overland trip, slower is almost always better.

Step 2: Drawing the path

This is the step where most people get stuck. You open Google Maps, trace the route, and the result is a line between A and B that doesn't consider what exists in between. Maps shows the road, it doesn't show the context, which region is worth stopping in, what type of scenery you'll cross, which city has decent lodging, which border is simpler, which stretch is pavement and which is ripio.

This is where GT Overlander comes in. Instead of you drawing the route line by line, you open "New Itinerary" and describe the trip in natural language to GT's AI: "I want to go from São Paulo to Bariloche in 25 days, passing through vineyards and stopping in historic cities", for example.

The AI returns the route with the path, stop cities and regional context, not just the kilometers, but what justifies each stop. If the itinerary passes through Cuyo, it explains why the detour is worth it. If it makes sense to cross the border at Pehuenche instead of Cardenal Samoré, it explains why. The AI handles the route, you handle the decisions.

The result already comes drawn on the map, inside the app itself. From there, on to step 3.

Step 3: Refining it with support points

The path settled, what fills the trip is still missing: gas stations on the right stretches, lunch restaurants in a good city, camping or an inn for the overnights, viewpoints that justify the stop, attractions worth the short detour.

On GT's map, you activate category filters, gas stations, lodging, camping, restaurants, attractions, bathrooms, mechanic shops, and they can be combined (all at once or only the ones that matter for this trip). The important thing: only the points relevant within the route's corridor appear. No screen clutter, no 500 icons that don't serve the path you're doing.

Each interesting point, you click the icon and it enters the route with one click, in the right position of the path, without you having to reorder anything. The drawn route updates automatically. In a few minutes, what was a line becomes a complete itinerary, with the look of someone who's done the trip.

When you're satisfied, a button exports the complete route to Google Maps, it opens there already configured with everything for real navigation.

Start planning your trip on GT Overlander, available in the app (iOS and Android with CarPlay) and directly in the browser.

Step 4: Practical preparations

The route drawn, now the part many people underestimate and that almost ruins the first day. The five practical preparations:

Vehicle. A complete service 30 days before departure, suspension, brakes, clutch, belts, fluids, battery, tires. On a long trip, urban maintenance isn't enough. What seems small (a CV joint boot, a suspension bump stop) becomes a serious problem on ripio.

Documents. International Driving Permit (IDP), Green Card (international insurance for the vehicle), the vehicle registration, an owner's authorization if the car isn't yours, a minor's authorization if traveling with a child. Without any of these, the border won't let you through.

Money and cash. An international card with no IOF tax (Wise, Nomad, Inter, C6 or similar), cash dollars as a reserve, local currency in a small amount for tolls and a little market. Each country has a nuance, Argentina accepts a card for almost everything, Bolivia requires cash, Uruguay is card-friendly.

Connectivity. A combination of a local SIM plus an international eSIM for the first days at the border. For whoever works while traveling or does a remote route, Starlink Roam becomes a strategic investment. Without internet, an offline map app and a dedicated GPS become a real necessity.

Health. Tetanus shot up to date, yellow fever mandatory to enter several countries, a basic first-aid kit, international health insurance. Going to Bolivia or Peru? Double attention to altitude, coca tea and gradual acclimatization.

Each of these topics deserves its own attention, all covered in detail in other GT articles. Here, what matters is fitting it into the calendar with room to spare: at least 45 days before departure, so that documentation, vaccines and the big service don't squeeze you.

Step 5: On the road

A good part of what decides the trip's success happens during it, not before. Here GT continues to be a central tool, in a different mode.

The waypoint Radar shows, in real time, everything that exists around your current position, with the same category filters as the planning. Need an urgent pharmacy in a city you don't know? Filter "health" and the radar shows the nearest one. A restaurant that wasn't planned showed up and you want to stop? Filter "food" and see what exists within a reasonable radius. Each radar icon starts direct navigation on Google Maps from your position to the point.

This is the "living trip" mode, when the itinerary stops being rigid and starts adapting to what shows up. A campground better than the planned one, a viewpoint that wasn't on the list, an emergency mechanic shop, a gas station on a deserted route. Planning well beforehand isn't fixing everything, it's being able to improvise safely during.

FAQ

How long does it take to plan an overland trip from scratch?

For a short trip (up to 2 weeks) with documentation already up to date, you can settle it in 2-3 weeks of planning. For a long international trip with a first border, count at least 45-60 days considering vaccines, IDP, Green Card and the big vehicle service.

Can I plan everything on the computer or do I need to install the app?

Both work. The web version has the same features when you're logged in, chat with AI, the map, filters, exporting. The mobile app gains usefulness when using it on the road (the Radar, CarPlay).

Does it make a difference to plan with AI versus drawing on Google Maps?

A big difference. Maps shows the shortest path between two points, it doesn't tell you which region is worth the detour, which border is simpler, which city has good lodging, on which stretch the pavement becomes ripio. GT's AI works with regional and cultural context, the kind of thing that normally takes weeks of research on forums and blogs.

And if I can't follow the itinerary to the letter during the trip?

No one does. An overland itinerary is a reference, not a contract. Its function is to give you a comfortable initial structure, what changes during the trip is part of the value of the experience. That's what the Radar is for, working in real time: the route can change but the discovery infrastructure is still there.

Can I redo the route during the trip if something changes?

Yes. Everything you planned is saved, and you can edit it at any time, add stops, remove them, change the order, export to Maps again. A good trip is a trip that changes midway.

To wrap up

Planning an overland trip isn't talent, it's a process. Whoever follows the order of the five steps, destination, path, support points, practical preparations, tools to use during, arrives at the start line with a light head, not with an incomplete checklist. The difference between whoever enjoys the first seven days and whoever suffers through them is here, in honest advance planning. And the best part: each trip you plan, you plan faster. The first one is the hard one. The next ones are almost just deciding where to go.