There is both an indoor and outdoor offroad track at my nearest track facility. I prefer the indoor because it's super high bite clay, and very technical. The track makes for really fun racing, and it isn't dusty/muddy. Plus it's the track that I have the best tires for (boa clays). The outdoor track is the usually farm dirt that eventually blue grooves up and gets rutty. It can be hard on tires, and it's never really consistent. At first it's muddy because of the watering, then it gets dusty, and then rutty, and then hard blue groove that's kind of dusty.