|Not part of Riordanverse|
Sisnaajiní, also known as Blanca Peak, is one of the four sacred mountains surrounding the traditional Navajo homeland. It is home of the rock crystal guardians.
Nizhoni Begay, Mac Begay, and Davery Descheny arrive at the mountain to find a perfect white shell for Spider Woman. They meet up with Rock Crystal Boy, who is hostile at first but warms up as he realizes they are not their to harm the mountain. After the three children introduce themselves by name and clan affiliation, he takes them to a pile of shells and has them sort through it for the perfect shell. As Mac, Davery, and Mr. Yazzie climb the pile, Nizhoni focuses and pulls out the perfect shell.
- The mountain is traditionally associated with the color white.