My run use to be just sand and dirt and always got so muddy after spring and fall rains. I found a new product at my local landscape store call PrimeraOne Field Conditioner. I love this product a bit more expensive than sand but the results and maintenance are worth it. I tried it out in one part of my run for a couple months and then this spring I shoveled out my entire run and put down a 3-4" layer of PrimeraOne. Here are the results.