How far could I walk my Aussie Shepard Puppy?

So my 11-week old Aussie shepherd just got her second round of vaccinations, and the Vet told me we were okay to walk her on the pavement and sidewalks. So I'm wondering how far I could walk my 11-week-old. She's always hyper on morning potty breaks and is always wanting to play tug with her leash, so I'm looking to burn off as much energy so I can get work done throughout the day.