Dear Ginger;
On behalf of Film Commission Chile we can tell you that near Santiago (Around Two Hours) you can find different mountains locations: Some of them are Portillo Ski Resort, Glaciar La Paloma, Valle Nevado, Glaciar San Francisco (Cajón del Maipo), and some others.
Winter season starts in June so it´s easy to find snow locations in July and Agoust.
Please, find more information visiting our website: http://www.filmcommissionchile.org
According to your request of location and Production Manager we can help you contacting different professionals depending on what kind of project are you working on.
Regarding to shooting permits, it will depends on where exactly you want to shoot, (Some counties charge different amounts, CONAF (National Forest Corporation) also regulate permits, so please contact us so we can send you the exact information.
Regards;
Raimundo Alemparte
Location & Information Manager
FILM COMMISSION CHILE