Kourtney Kardashian shares road trip throwback of the family eating behind their pick-up trick

Kourtney Kardashian enjoyed her recent family vacation to Yellowstone National Park.  

The reality star, 41, posted a throwback of the family feasting on to-go boxes of wraps and chips while sitting inside of a pickup truck on Sunday.

The family had pulled over in the middle of the forest to to eat.

'picnic in the pickup,' she captioned the snap. 

In the photo, Kourtney supervised her children Mason, 10, Penelope, seven, Reign, five, and niece North, seven, and nephew Saint, four.