Trying out something different.
I started out in Substance Designer making a quick basic snow material. Something not too rough looking with a glitter effect. I actually watched Blender Guru's tutorial on snow, and his team has a great free set of Photoshop brushes (I used a few of them to help make the tracks and footprints). I went into ZBrush and used a mocked-up height map I made in Photoshop as a mask to inflate a subdivided plane. I also found some photo-scanned height maps on Textures.com that I brought into Photoshop to turn into alphas for stamping inside of ZBrush.
After baking in Marmoset, I went to Substance Painter to compile the final material. I used an asphalt material by Janine-Smith on Substance Share for blending underneath the snow. The rest was compositing bakes and using generators in Substance.