Yes, most hotel reservations are fully refundable if you cancel before the accommodation's cancellation deadline, which in most cases is within 24 or 48 hours of check in. If you booked a non-refundable reservation, it might still be possible to cancel it and receive a refund within a 24-hour period of your booking. Plug in your dates, click on "Search", then use the "fully refundable" filter to get the best deals available near Cerro Mutún.