Pretty cool track! However I do have some things to say about different things
First off, overall good. I do wish you had spent the time finishing it off with billboards, statues etc. The pit lane looks great and I do like you have ontrack, offtrack and grass decals. Bales and track markers are good too!
The track size is a little off to me. It felt like it was built on a 450 (?) as most things are very long and you almost have to have a 450 unless you want to pin it really hard, just to get over. 125 is even harder
Sand IMO, coming from Sweden, I see as soft and with very good traction. The traction here is nice, got to give you that! It's not just a "little more roll resistance with ice friction" thing as many seem to do. However some ruts and breaking bumps are really stiff and hard when you ride them. Getting a good feeling of it can be a real pain, but if you look at the image, the ruts have almost a sharp edge, which is very weird for sand. They might have it in real life, but they also break upon hitting the soft edges too, unlike in sim where you have to build that feeling into the rut. Having a trackmap is a super sweet addition too. I hate having none or make a map! I'm looking forward to future tracks from you, as you seem to be willing to put time and effort into them