Lisl has been going up and down a flight of 15 carpeted stairs since was was old enough to get up on to the first step. Probably 10 or 11 weeks or so. I didn't record her age at the time.
I really wish I had recorded many other firsts as she was growing but did not.
I wouldn't run her around on concrete until she's a bit older. It can be hard on their joints.
This is my first dog and I wasnt sure how much and how often I should walk my German Shepherd puppy?
those chuck its are a life saver. Target has them cheaper than petco or petsmart, and amazon has it cheaper than that if your wiling to wait.I can't run with her because of my arthritis, but I walk with her twice a day (at 7 months) with a total of maybe 2 1/2 - 3 miles. I also toss the the ball with her as long as I can stand (hurt my arm doing it, too, so I think I'm going to get one of those chuck-it throwers). She tends to get overheated in the summer so the walks are usually early morning/late evening. Keep an eye on the slobber and panting when you take yours around.
GSDs seem to have a ton of energy, so as much as you can do is probably fine. I don't have any stairs so I don't know about that.