Kendall Jenner's hiking cover might've been blown by Devin Booker -- whom she's been dating -- because the dude made it clear ... Arizona was the place to be pre-NBA bubble.
The model posted a photo Saturday of her in a cool looking desert-y, mountainous region with a body of water below. She called it "not earth" from a trip she took a few weeks ago -- but didn't give much more of a hint than that. It could be anywhere on its face.
Now, it appears her recent point guard boo thang might've actually spilled a major clue -- assuming he and Kendall are still hanging out as much as they were earlier this year.