According to a test by United Exterminating Company to trap and track the squirrels through both using straight-line runs and zig-zag patterns to different areas and spray paint to mark them, it turns out:1- 2miles: squirrels don’t have any trouble getting back
1- 2miles: squirrels don’t have any trouble getting back
5-7 miles (with zig-zag pattern): returns were rare, 1 out of 15-20.
10-12 miles: Occasionally, there were squirrels returning back, but less than a half-dozen times
25 miles: only one surprising return
Conclusion: activity range is less than 5 mile. It is very rare for squirrels to go larger than 10 miles.
So the squirrels really can travel everywhere to search places to have fun and for food resources.