Mr. Seamus is just about 6 months and we go for nice leisurely mile to mile and a half strolls through the neighborhood at night. He loves it, it gets him tired out before bed and he does really well (most of the time). It usually takes us around 30-45 mins to go a 1-1 1/2 miles lol. When it was hot out we would only go about 5-6 blocks so he wouldn't get over heated. My breeder said that she takes her big dogs on 2 mile walks through her neighborhood and they all do great!