Locate the collapsed highway by the southern edge of the Barren Clearing

How do you complete "Locate the collapsed highway by the southern edge of the Barren Clearing"?

This is step 1 of 2 in Keeping an Eye Out, given by Celeste. It is completed on The Blue Gate.

• Keeping an Eye Out
• The Blue Gate

What are the other objectives in Keeping an Eye Out?

Keeping an Eye Out has 2 objectives in total: Locate the collapsed highway by the southern edge of the Barren Clearing and Find Bilguun's shelter, and search for any clues of his presence.