either mojave or a really nice normal, My big female looks a bit like that, and if she is a normal, we will find out in a couple of months. I bred her to my fire, but only time will tell. The best shot at finding out what it is is breeding it out. I am not sure if my female is a mojave either, but it looks quite similar to your snake.

here's mine for comparison



she looks even more yellow and the side fading is greater after shed or when she was smaller it was GLOWING,

im guessing real nice normal