For predator calling? Not very far. I once did a loop of about five miles with a crazy guy from AZ. Aside from that, I'm with Huachuca Caller - typically within 1/2 mile of the truck. There is a lot of country to call here, so I'd rather make more stands than spend time walking. Later in the year, after they've been called at a lot, I will move farther away from roads to get "fresh ears" or at least try to find predators that are more at ease and will to respond. I also often call with a couple older fellas who aren't up for long hikes, so when I'm with them we usually hunt withing 300-400 yards of the vehicle.