Greenways are paths reserved for bikes and walkers, often built on former railway lines. Car-free and almost flat, they are ideal with children. Several are cross-border: the Vennbahn links three countries over 125 km, the Parenzana runs through Italy, Slovenia and Croatia. To book the evening stop and stay reachable with the kids, one eSIM covers the whole route without swapping cards.
Cycling with children, without meeting a single car and without climbing a hill, is possible, and it has become something of a European speciality. They are called greenways, and many follow old railway lines handed back to the bike.
Here are the ones worth the trip as a family, why they feel so comfortable, and how to sort out the evening stop without complicating your life when the route slips from one country to the next.
What a greenway actually is
A greenway is a route reserved for non-motorised travel, separated from the road. In France alone, the network tops 25,000 km across national, regional and local routes, often built on former railway lines, canal towpaths or riverbanks.
The appeal comes from their origin. A train could not climb steep gradients, so a former railway line stays almost flat. That is what makes these paths doable for children of 7 or 8 riding on their own, and restful for everyone else.
The surface matters for comfort. Most national greenways are asphalted, which suits any bike and a child’s small wheels. Others keep packed earth or fine gravel, pleasant but slower when it rains. A quick check of the surface before you leave tells you whether a road bike will do or whether slightly wider tyres make the day easier.
Our cross-border pick
Here are five greenways that often string several countries together, from the north to the south of the continent.
| Greenway | Countries | Landmark |
|---|---|---|
| Vennbahn | Germany, Belgium, Luxembourg | 125 km, former railway, max gradient 2% |
| Parenzana | Italy, Slovenia, Croatia | 123 km, old narrow-gauge line, Trieste → Poreč |
| Danube Path | Germany, Austria | Passau → Vienna, the great family classic |
| Avenue Verte | France, United Kingdom | London to Paris, with long traffic-free sections |
| ViaRhôna (greenway) | Switzerland, France | From Lake Geneva to the Mediterranean, very flat along the Rhône |
Two of these deserve a word of warning before you commit. The Avenue Verte reads as a single London to Paris line, but it stitches together traffic-free greenway and quiet lanes, so expect some road sharing on the English side and around the city approaches. The Danube path between Passau and Vienna is the surest bet for a first trip: smooth, waymarked both banks, and served by trains the whole way, which makes it easy to shorten if the children tire.
The Vennbahn, three countries with no effort
The Vennbahn is arguably the most striking cross-border greenway in Europe. Over 125 km, it links Aachen, in Germany, to Troisvierges, in Luxembourg, crossing eastern Belgium and the peat-bog landscapes of the High Fens.
Because it follows a railway line from the late 19th century, the gradient never exceeds 2 percent. You can ride it gently over two or three days, return by train from Aachen, and enjoy a smooth surface from start to finish. It is a perfect setting for a first family tour.
The Parenzana, from Istria to the Adriatic
Further south, the Parenzana follows the old narrow-gauge railway that linked Trieste to Poreč until 1935. Over 123 km, it passes from Italy into Slovenia then Croatia, through the olive groves and vineyards of the Istrian hills.
The gradient stays gentle, but the surface alternates between packed earth and quiet lanes: fit slightly wider tyres rather than a road bike. The reward is the hilltop villages and the descents towards the Adriatic.
Riding with children without the stress
A few simple markers make these outings far easier with children. Aim for short stages, around 25 to 35 km a day for youngsters of 8 to 10, and leave room for breaks.
Pick the direction of the slope, however slight, to match the tiredness: on a former railway line, heading downhill towards a station lets you take the train back if the day ran long. And always keep a fallback in mind, because a flat tyre or a storm arrives quickly.
My advice: scout the stations along the line in advance. Being able to cut a stage short changes everything when a child runs out of steam halfway.
Navigating and booking on the way
On a greenway you rarely get lost, but the phone still earns its keep. It finds the guesthouse for the night, the shaded picnic spot, the nearest station for the ride home, and reassures a worried grandparent with a simple location message.
As soon as the route crosses a border, the connection question appears. On the Avenue Verte, you pass into the United Kingdom, which is no longer covered by EU roaming since Brexit. On the ViaRhôna, the Swiss part is not covered either. A standard plan can then charge for data at full price.
The simplest answer is to activate an eSIM for Europe before you leave. One eSIM covers the whole continent and switches networks automatically at the border, including on sections outside the European Union. You book your stop and stay reachable, from one country to the next, without swapping cards.
- Choose a former railway line: the gradient rarely tops 2 percent.
- Plan short stages, 25 to 35 km a day with children.
- Scout the stations along the route so you can cut a stage short.
- Book lodging online, often on the same day out of peak season.
- One eSIM covers the cross-border routes, even into the UK or Switzerland.
With Orange, the service from a provider with over 300 million customers, you ride light: 200+ destinations covered, human support 24/7, and 100% refunded if you never use your eSIM.
Ready to ride as a family from one country to the next without swapping cards?
