Every time I have admired natural, gravel, shell, sand, native, or crushed rock cart paths and talked with the super about the “the look,” he hates them for the maintenance required. Most recently at WKP Saguaro when the general manager said that they were going to pave them. I think Tom Doak said something like hiding the paths behind berms or mounds or some form of shaping adds a million dollars to the construction budget. Although I think the tide is turning, the majority of our customers prefer to ride. I don’t have a practical and aesthetically pleasing recommendation. Like it or not, carts are part of the game in the US and cart paths are ugly. I don’t know if there is a good solution, but this is certainly a vital architectural inquiry and an important design element/decision. Almost always if the course employs some form of “natural” paths, they also use some form of binder to keep the dust and erosion down. Still, they require constant, non-golf, maintenance. Solve this problem and you’re a hero.