We walk our dog daily and whenever possible take him on hikes. As he is getting older, some of these hikes are tiring him out now. Get home and he plops down on the bed and doesn't move until the next day. However he is happy.
I don't do much dog walking since my sister got married a few years ago, and took her doggy with her. But I just went over to their place to let their dogs into the yard to pee, since they are over in SF checking out the Academy of Science and got behind schedule.
We're lucky enough to have a dog park, which is great because I don't have to carry around a bag of poo after he does his business.