A Community Within A Community. Located on the 40th parallel, PARK40 Apartments is conveniently located just north of Denver, just east of Boulder, and part of the 1,100-acre master-planned community, Baseline, in Broomfield. The community's park-like setting on 13.5-acres keeps the Front Range in your sightline and brings urban conveniences like shopping, dining, bars, and entertainment within a stone's throw from these stunning Baseline apartments in Broomfield.