What trails should I do in winter at the french Pyrenees? This trails should be circular and take two days to complete with one night of camping
There are many great winter trails in the French Pyrenees that can be completed in two days and with one night of camping. Here are a few options:

1. The Boucle des Lacs: This circular route takes you around the beautiful mountain lakes of Néouvielle. The trail is approximately 20km long and takes 2 days to complete. You can camp at one of the designated campsites in the area.

2. The Tour du Pic du Midi d'Ossau: This circular route takes you around the iconic Pic du Midi d'Ossau. The trail is approximately 27km long and takes 2 days to complete. You can camp at one of the many campsites in the area.

3. The GR10: This is a long-distance trail that runs the length of the Pyrenees. You can choose a section of the trail to hike in winter, such as the section between Gavarnie and Luz-Saint-Sauveur. This section is approximately 22km long and takes 2 days to complete. You can camp at one of the designated campsites along the trail.

It's important to note that hiking in the winter can be challenging and requires proper gear and experience. Make sure you are prepared for the conditions and check the weather forecast before setting out.
What about for cross country skiing?
For cross country skiing in the French Pyrenees, here are a few circular trails that can be completed in two days with one night of camping:

1. The Plateau de Beille: This is a popular cross-country skiing destination in the Pyrenees. The Plateau de Beille has several circular trails, ranging in distance from 5km to 20km. You can camp at the Plateau de Beille campground.

2. The Haute-Vallee de l'Aude: This is a beautiful valley that offers several cross-country skiing trails. The trail distance varies depending on the route you choose, but you can plan for a 2-day trip by combining some of the shorter trails. You can camp at one of the designated campsites in the area.

3. The Pays de Sault: This area has several cross-country skiing trails that are suitable for a 2-day trip. The trail distance varies depending on the route you choose. You can camp at the Pays de Sault campground.

Make sure to check the weather and snow conditions before heading out, and bring proper gear for cross-country skiing in the winter.