Hiking is a great way to get out and give your active dog a chance to really run. It will also give you an opportunity to really work your muscles on some harder walks. Not all areas allow dogs to be off leash or even to come along though, so make sure you check out the rules before you bring along Rover. Dogs are not allowed at National Parks for instance. It is also very important that you and your dog understand the etiquette of being out on the trail. You should always clean up after your dog when you are hiking and shouldn't let your dog off leash if you don't have a strong recall. If you know the rules and trust your dog, it can be a great workout. In fact, if your dog is fit and healthy he could even carry a third of his weight in a backpack with water or snacks.