DENVER — Sunday was one of those days in the Rocky Mountains they put on postcards, so pretty and pleasant it makes a mile high seem like a delightful place to do just about anything. Even play baseball. Not that anyone would go that far. But it was the rare wonderful Colorado day for the Padres — and at a most important time. They took a six-run lead, had the game get uncomfortable on them as games often do in the thin air and within the mammoth confines of Coors Field, and then pulled away with another big inning for a 13-6 victory over the Rockies. The day was made even better with what hap…