Jackson goes outside to potty, so I'll take him out in the backyard on leash multiple times a day when I'm home. I live on 3 acres, not in a neighborhood with sidewalks, so I have to drive 2 minutes up the road to a nice neighborhood to actually 'walk' him. He gets one walk per day and it's between 30 minutes-45 minutes. He badly needs that walk every day, or by 5pm, he starts to really annoy me, LOL.
The only reason we don't walk is if it's nasty hot outside and usually those days we go over to my dads house with his inground pool, where he gets a ton of swimming, plus running with the other dogs. Also winter time is alot harder when it's freezing and dark by 5-6pm so we try to get to the dog park a lot more, indoor fetch games, trick training, etc. This dog always needs his mind occupied.