You run to the field

You're not taking chances with either group and you decide to run. A quick analysis of the vehicles tells you neither of them can go through the field and you're pretty sure you can outrun the large girls.

You sprint into the field without hesitation. After a good run you glance over your shoulder and see the 4 large girls chasing you but you're pulling away from them. The van is hauling ass around the field but it will take some time and the black car has seemingly vanished. You smile and keep running until you get to the other side. You find yourself at a county highway that you know leads to campus. You know you can't run the whole way there before the van catches up to you but about 30 yards up the road there is a truck that is pulled off and changing a tire. Maybe they could help you?

Across the street is a corn field that you could potentially hide in. There's also a driveway that presumably leads to the farmer's house.

You see the white van turn on to the highway about a mile down the road so you can't go right. The large girls about 50 yards behind you so you can't go back.