Green Bay is in eastern Wisconsin, 90 miles south of Milwaukee. It has unique geographic setting, at the mouth of the Fox River and at the head of Green Bay, a sub-basin of Lake Michigan. There are excellent options for running in Green Bay, considering its population of barely 100,000.
The best places to run in Green Bay are the paths along the Fox River and East River. Another terrific run is to combine the University of Wisconsin campus & adjacent Arboretum and cross country course. Near downtown, the historic Astor Park & Allouez neighborhoods are lovely, and a good option in winter when trails might not be cleared. There are also several longer multi-use paths in the area: Mountain Bay State Trail, Duck Creek Trail, & Ahnapee Trail. For trail running, head to Barkhausen Preserve or Reforestation Camp.
Runners should note that Green Bay winters are cold and snowy. Some trails might not be maintained in winter or are used for XC skiing.