Walkable State Borders by DanielO

Question 11

Hovenweep National Monument, which is on the border between STATE 1 and STATE 2, preserves six groups of stone structures that long ago made up Native American villages. The monument sits atop a multi-state straddling geologic feature named for STATE 1. It's possible to hike the Holly Trail through the monument west from STATE 1 to STATE 2.

Colorado and Utah