I've had the chance to stay in Highlands Ranch, CO a couple of times in the last ten years. It is a beautiful suburb of Denver. The city (CDP) is nestled up against the foothills of the Rocky Mountains. This means there are plenty of opportunities for people who enjoy hiking, biking, and hunting. Denver's variety of museums, nightlife, restaurants, and concerts are easily accessible from Highlands Ranch too. In fact, the drive from Highlands Ranch to Denver will only take about 30 minutes.
Since Highlands Ranch is a suburb of Denver, there are lots of families. Highlands Ranch mainly consists of lots and lots of housing developments. There are several parks, a skate park, and a recreation center in Highlands Ranch. Also, if you are looking for good shopping, Park Meadows Mall is in Highlands Ranch. There are a couple of resevoirs nearby, so folks that enjoy watersports can enjoy boating and fishing.
There are several good restaurants for families in Highlands Ranch. For those that like chains, The Cheesecake Factory is excellent. My family likes to go to La Villa Mexican Restaurant. The food is good, the atmosphere is family-oriented, and the margaritas are excellent!