Europe’s Mythic Long-Distance Trails and Staying Connected in the Mountains

A long-distance trail is the promise of walking for days on end, following a marked line across a country or a range. Europe has hundreds of them, but a handful have become goals in their own right, the kind you tick off once in a lifetime.

Here are four, from the most technical to the most remote, with their real numbers. And because these trails take you away from the world, one real question comes back every time: how to stay reachable and well oriented when the signal gets scarce.

The GR20, the traverse of Corsica

The GR20 links Calenzana to Conca, crossing Corsica from north to south over about 180 km and close to 12,000 m of ascent. You close it in 12 to 16 days, and it is regularly named one of the toughest trails in Europe.

It is not dangerous for the well prepared, but its northern stages string together rock steps, slabs and fixed chains. This is high Corsican mountain terrain, with summer storms that build fast. The day’s forecast becomes vital information, and that is exactly where the signal plays hide and seek between two ridges.

The GR10, the Pyrenees coast to coast

The GR10 crosses the entire Pyrenees on the French side, from Hendaye, on the Atlantic, to Banyuls-sur-Mer, on the Mediterranean. About 866 km and a staggering total of ascent, for a full traverse that takes several weeks.

Here is the interesting part for your phone: it runs along the Spanish border for most of its length. High in the mountains, the nearest signal often comes from a mast on the Spanish side, and the phone sometimes latches onto a Spanish network without being asked. Since France and Spain both sit inside EU roaming, it changes nothing on the bill, but it is a good reminder that a border, on foot, does not exist for radio waves.

The Kungsleden, Swedish Lapland

The Kungsleden, the “King’s Trail”, crosses Swedish Lapland over about 440 km, from Abisko to Hemavan, well beyond the Arctic Circle. It is the great wilderness walk of northern Europe, done over several weeks, between refuges, lakes crossed by rowing boat and tundra as far as the eye can see.

Here, coverage becomes genuinely patchy. Over long stretches you simply have no signal. Sweden is inside EU roaming, so no billing surprise, but the real issue lies elsewhere: having your maps and track fully offline, and using the rare coverage points, near stations or huts, to check the forecast and flag your progress.

The West Highland Way, Scotland outside the EU

The West Highland Way links Milngavie, north of Glasgow, to Fort William, at the foot of Ben Nevis, over 154 km. Moderate difficulty, about a week of walking: it is the accessible long trail of the United Kingdom, through lochs and Highlands.

Its quirk is a phone one. Scotland is part of the United Kingdom, which left the EU roaming area after Brexit. On an ordinary plan, your data there can be billed separately, sometimes dearly. It is the one of the four trails where the invisible border really costs money, and it is often where people get caught, thinking they are still inside Europe.

The four trails side by side

Distance, difficulty and the phone point to watch for each.

Network coverage and offline in the mountains

On a long trail the phone does three things that truly count: following your track so you stay on the right side of a ridge, checking the forecast before an exposed section, and being able to raise the alarm if something goes wrong. The emergency number 112 works everywhere in Europe, as long as you have a signal.

The right method comes down to a few reflexes. Always download your maps and track offline before you set off, because you cannot count on the network at altitude. Switch to battery saver and turn data off when you do not need it. Keep it for the evening booking, the forecast and the messages home.

Then there is the border trap. A long trail can send you across a country, or along a border, and some countries stay outside EU roaming: the United Kingdom for the West Highland Way, Switzerland on the Alpine traverses. That is the moment an ordinary plan goes off the rails.

The simplest answer is a eSIM for Europe set up before departure. One card covers the countries of the great trails, United Kingdom included, and the phone switches to the best available network on its own. You have nothing to find on the ground, and you keep access to the forecast and the alarm wherever you get a signal. Our guide One eSIM for all of Europe maps out exactly where roaming ends.

With Orange, the service used by more than 300 million customers, you walk with a clear head: 200+ destinations covered, human support 24/7, and fully refunded if you never use your eSIM.