We took my son at 4, 5, and are taking him this year at 6. We have never needed a stroller. My son is active and walks/runs a lot. He never seemed to tire out, and if he did we took a small break (great time for lunch, snack, dinner). To be honest, I can't imagine trying to keep up with a stroller in crowds, find it after a ride, etc. We do carry a backpack with anything we might need.