This film features a number of castmembers from Director Richard Linklaters 2014 film, "Boyhood": Ellar Coltrane, Patricia Arquette, Ethan Hawke, & Marco Perella.
Greg Kinnear's character is credited as "Don Anderson", however, he clearly introduced himself as "Don Henderson" to the cashier after ordering at Mickey's.
In the scene where Amber and her friend are driving and talking about going to a college party, an HEB grocery sign is clearly visible in the background. This grocery is only located in Texas, so therefore the girls in Colorado wouldn't be driving by it.