Flat, mostly open corners on a good surface make this a nice stretch.
From St Paul-De-Fenouillet take the signs for the Gorges De Galamus. This is a spectacular road along the top of an amazing gorge. There can be a lot of tourists here but if you carry on most traffic dissapears and you are in a stunning valley, with a very winding road all the way to Rennes Les Bains - a pretty village on a river. This route is quite slow but if you want to get off the beaten track its great.
From Axat the road passes through some spectacular gorges then follows the bottom of the valley with tight right hand bends and fairly open left hand bends, the surface is fairly bumpy so if ridden quickly makes it quite challenging. Keep an eye open for a petrol station on the left after about 20kms it is also a restaurant and trout farm, you can either fish your own trout or catch one in a net, either way 8 minutes later it is on your plate cooked! the corn fed chicken and chips is also excellent. About 10 k later you start to go seriously uphill and the roads eventually open out and you end up near the ski slopes. Make sure you stop opposite mont louis airfield the view of the canigou and the pyrenees is breathtaking. See video for more of an idea.
La Seu d'Urgell - Sort section
An unbelievably good road across the pyrenees which runs from quite close to the Andorran border down to the town of Sort. There are many fast open corners with great visibility, allowing you to use road width to the full. This is one of if not the best road I ever rode. A must if you are in the area. The only downside is that sometimes some cattle walk into the road, but this is only a problem on a few of the more blind corners travelling up the mountain at the start of the route.
Absolutely stunning piece of road - one of the best I've ridden anywhere in Europe. Classis mountain twisties, smooth tarmac, no traffic. It's hard to pick out one stretch of the N260/N152 route across the pyrenees as being the'best', but this is probably my favourite of the lot. You can really open up a big sports bike along here, but make sure your brakes are up to the job - they'll take a real hammering on the downhills.