Hello Speet,
I knew about the filming locations in the Hanksville area because of the apparent airport building way in the background. But I didn't know the location of the fake Nevada/California border. Another great find!
And I can add some updates on K's midnight ride through Denver:
Here he is on South Colorado Boulevard in the Cherry Creek neighborhood, with Burns Park on his left. 'Columbia Savings' billboard and 'Ramada Inn' neon sign ahead.
Google Street View
The former Ramada Inn is now the: Holiday Inn Denver - Cherry Creek / 455 South Colorado Boulevard
This is about the barely two seconds long blurry camera sweep where three buildings can be seen:
Key to the discovery of this location was the Googie-Style (Flying Nun Roof) architecture of the restaurant, which pointed to Denver's 'White Spot' restaurant chain. They operated several restaurants, all in Googie-Style (aka Space-Age architecture) buildings.
'White Spot' ceased operations long ago; this restaurant later became a Hooters franchise:
White Spot (Hooters)
This is how it looks today (Google Street View)
And finally; a great ad from Colorado Dodge (also visible in the movie):
https://i.pinimg.com/originals/e9/0e/8b/e90e8b36176b34103cf299d20736e7a6.jpg