Hi Ben,

In Highlands Ranch, you are seeing primarily Austrian Pines and Ponderosa Pines rather than Red pines (Pinus resinosa)--it is too hot here for that characteristic tree of the northeast to perform well. 

Ponderosa pines are a good, drought tolerant choice and because they are not shade tolerant, produce an open canopy.  They are, however, susceptible to certain pests and diseases, most notably the mountain pine beetle (which is ordinarily not a problem, but is currently in outbreak and has been killing pines in the metro area).

Austrian pine is more shade tolerant but looks very similar, maintaining a denser canopy.  It is also susceptible to a variety of bark beetles, notably ips engraver beetles.  Bark beetles can be prevented using insecticide injections or trunk sprays; usually a healthy tree can defend itself though.  Most trees growing in home landscapes get enough water to not require preventative treatments; though if the tree is stressed by damage, construction, or drought, it might be a good idea for a "high-value" tree.

Scotch pines also grow well in the area generally, but are highly susceptible to Pine Wilt, a disease caused by microscopic roundworms and transferred between trees by longhorn pine borers (a much larger beetle than bark beetles, and much harder to prevent with insecticides).  I would avoid planting this tree.

Limber pines prefer cooler temperatures at slightly higher altitudes; while they can grow at our elevation they tend to be stressed, and therefore more susceptible to disease/insects.

An Austrian or Ponderosa pine will probably be your best bet, and are widely available at nurseries and garden centers.

Cordially,

John