Boondocks

[poli]

I've seen the term quinto pino, but I think it's Spain-specific, and I half answered it with Patagonia in a previous post. Is these another term?

[AngelicaDeAlquezar]

If it means "very far away", in Mexico you can say:
- en/hasta el quinto infierno/averno
- en/hasta casa del diablo
- donde el viento da la vuelta
- donde Dios perdió la chancla (probably too colloquial)
- lejísimos

If it's a remote (underdeveloped) rural area, I can only think of: "en el cerro".

[poli]

Thank you.

[AngelicaDeAlquezar]

Glad to help.
I hope someone else has more ideas. I had never heard "quinto pino".

[pjt33]

Quinto pino is quite common in Spain, but I wouldn't have known what boondocks means.

I wonder what is so special about the number 5. The superlative of pasarse, at least in Spain, is pasarse cinco pueblos.