Spectacular. Off road track that can be made with a Roadster. Better in july to september.I like entering into the desert by north.From Carcastillo take the NA-534. The road goes slightly up and some where before the top of the slope, turn right. Theres a sign indecating Bardenas Reales Enter. Its a track through 40 km.Only one road possible. Cant get lost. Places to visit around:OLITE, the Castle ( touristic place, quite expensive)You can sleep in TUDELA, NH HOTEL, have diner on the main city place.