Welp, with the help of a Chileno amigo i found someone who rents mountain bikes! Not a shop or store. Just some guy and his garage. The way things work down here are kind of different. Not better or worse, just different.
Anyways, there's a guy down here who rents bikes out of his garage. He rents Trek 3900 series to be exact. Red ones, blue ones. Old ones and new ones. I myself rented a red and white not so old bicycle this past weekend and rode it all over the city. Good times, indeed.
Here is a photo of my Chileno amigo, Herald (on the right), and my French friend, William (on the left), on a ride to the forest reserve west of town. American friend and fellow cartographer Lee (not pictured) rented a bike too, but he caught a flat riding over broken glass or going over a curb or something dumb. Sorry, Lee. Better luck next time.
If you're interested, you can check out Lee's blog here. I don't know if his blog is working right now, but be patient and check back in a week or so. It should have lots of pretty pictures and stuff and things and more exploits of life down in beautiful Punta Arenas. Hope everybody had a good weekend!