Walking these trails, you can genuinely feel the intention behind every inch of this place. American Bison Up CloseA bison bellow is not something you hear so much as feel. American bison are the centerpiece of the Free-Roaming Area at Northwest Trek, and they carry that role with impressive dignity. Practical Tips For Planning Your VisitGetting the most out of Northwest Trek starts with a few simple preparations. Northwest Trek is home to woodland caribou and moose, two species that look almost prehistoric when standing at the fence line.