People traveling with dogs know that dogs are not allowed “below the rim” of the Grand Canyon. If you want to travel down the trail to the bottom of the canyon with a four legged companion than a mule will have to do. This fact turns off many travelers with dogs in tow towards a visit to this very popular and awesome National Park. It need not be avoided. In fact, we consider the Grand Canyon one of the most dog-friendly of the National Parks. What is not as often mentioned is that, while dogs are not allowed below the rim of the canyon, 98 percent of visitors do not hike below the rim. It’s a very strenuous hike.