While the book doesn't explicitly name the location, it describes it as a hidden oasis with a spring-fed pool, wildflowers, and a majestic rock formation that Stargirl calls "the Sentinel".
This place represents Stargirl's freedom, individuality, and connection to nature, and it's a place where she can be herself without judgment.
Let me know if you'd like to know more about the book or Stargirl's character!