The Bonanza Race track is closed until the 22nd of March for repairs to the surface. I have only been to one track in Thailand and that is Bonanza. The surface was suspect in the last two bends and there were a few areas where the management had painted white warning markers. That said the setting is beautiful and it was very quiet. I rode to the track from the very north of Thailand and had a great couple of days, despite the track condidtion. When it is finished and hopefully properly, it will be an excellent place for a few days R&R and track fun. If you have not been, try it out.