Alta Ruta de los Perdidos y el Vignemale is an incredible circular trek that crosses the highest limestone massif in Europe. This trek visits parts of both the Spanish and French Pyrenees and gives a wonderful sense of freedom, as well as the spectacular scenery of this superb alpine environment. Through the National Park of Ordesa and Monte Perdido and the National Park of the Pyrenees, you cross landscapes of spectacular beauty.

You climb Monte Perdido, at 3,355 metres (11,007 ft), as well as Vignemale and Petit Vignemale, at 3,298 and 3,032 metres (10,820 and 9,948 ft) respectively. These ascents are deviations from the main route and are entirely optional.

In total, there are 103 kilometres (64 mi) to conquer and almost 8,000 metres (26,246 ft) of elevation gain. Due to this, I suggest attempting the route in seven stages. Each stage ends at a glorious mountain hut.

You need to be in very good physical shape to tackle this classic route. It starts in San Nicolás de Bujaruelo, while there’s also the alternative of leaving directly from the Bujaruelo hut, which you can reach by car. This way you will spend the different nights in the well-known huts of Sarradets, Góriz, Espuguettes and Oulettes, among others. I advise you to book before you go and to plan the stages according to your fitness, especially if you go in high season. Remember that you are in a high mountain environment where the weather can change very quickly and access to certain services can be limited.

The best time of year to enjoy trekking in the Pyrenees is from late spring to October. September is the most stable month in terms of rainfall, and there should be no more snow preventing access to the higher areas by the summer months .

The scenery evolves with each stage and there are incredible stories to discover on both sides of the Pyrenees. Europe's southernmost glaciers are melting faster than ever, so this may be a good opportunity to see them. What this leaves us with are waterfalls, torrents and flowing rivers, good places to source water as you progress through each stage. It wouldn't hurt to use a filter or water purification tablet, just in case. Also, always carry snacks and spare food for emergencies.

During the route, which is signposted at all times, you discover iconic places such as the faja de las Olas, the Marboré Lake, the Gavarnie Cirque, the Roldán Gap and the Vignemale Massif, among many other incredible spots. Remember to wear boots you’ll be comfortable in on technical, steep terrain. Sun cream is essential, as are warm layers and waterproofs for the nights or times when the weather turns.

What I’m sure of is that this trek is one of the finest in the Pyrenees. If you ensure a week of good weather, fun and adventure are guaranteed.