How to find us

In a city where desert and mountains collide,
A balloon-filled sky is the locals’ pride.
To the northeast you'll wander, not far from the sand,
Where Stanford’s path through knowledge stands.

Not quite thirty, but close in the count,
Two and nine twice, then zero to mount.
Where chile is hot and sunsets amaze,
Find me tucked in Duke City's maze.

What is my address?