Wintertime swim

There's a place northwest of Presidio that offers hot springs and a cool pool with a great view of the mountains, Chinati Hot Springs.  You can camp or stay in one of their adobe/stone cabins, and some of those cabins even have private hot pools.  The place is ultra-relaxed and unpretentious...all meals are on your own and there's a communal kitchen available to every guest at the property.  There's also hiking trails on the property, which we suggest you take early in the morning, so you can see the rosy light on the mountains all around!