Tacoma News Tribune: Thousands of cars, pickup trucks and minivans carry visitors to Mount Rainier, North Cascades and Olympic national parks. They leave behind tons of plastic water bottles, granola bar wrappers and banana peels. Mount Rainier staff have a two-hour, 60-mile drive just to get from one area of the park to another. Heating the Hurricane Ridge visitor center at Olympic costs almost $12,000 a year for diesel fuel. Carbon footprint for a trip to Mount …