Wren is an efficient speed walker. While they haven't done a lot of hiking specifically it's very clear very quickly that Wren is in shape enough to at the very least probably be an athlete of some kind? Yeah probably just that. There's also a lot of practicing how to use their IntelliPhone for pictures, which can also be inferred through observation - Wren has never used a smartphone before.

"Oh-? Oh! Yeah, this can take pictures, think I could just upload one of the map so far? If we could get a good solid idea of how far out we can go - well, multiple people trying different directions will be faster than just trying it all myself," Wren says as they think aloud, like the idea that they could get help with this hadn't really occurred to them before now in spite of having more or less asked Daryl for help. Then, after a moment, "... What's reddit?"