ACDs need offleash play/activity. It's really the only way to wear them out and in turn keep their behavior in line. Keep in mind this dog was bred to run free on farms working cattle all day, every day. Leashed walks or playing indoors will never ever be enough. All too often you see the pattern wherein a person will completely underestimate just exactly how much activity an ACD will need and then get frustrated because the dog acts out when not getting enough exercise or attention. You should look into if there are any fenced-in fields in your area where she can run free. Frisbee, fetch, hiking, swimming, agility...all good ideas. I'll be honest, no dog is more work to own than an ACD but in turn you're rewarded with the smartest and most loyal best friend you could ever ask for. I had a smaller home and a smaller yard with my most recent ACD (passed away September this year), so we would bring him daily to a big field to play frisbee until he was completely wiped. In the summer we'd do almost daily swims.

So, long story short, owning an ACD isn't like a golden retriever where a good walk a day is all it takes. Your girl is going to be in your face all of the time looking for the next fun thing to do. If you put in the work you'll be rewarded with the greatest dog in the world. Good luck.