Where is a good place to rent ATV's here?
The place I am familiar with is the general store at St. Elmo. http://www.st-elmo.com/index.html
There's at least one place in Salida and Buena Vista. www.allseasonrentals.com/atv/atv-rentals/
Since we have our own ATV and have not rented from these folks, I am not in a position to comment on whether one place is better than another.