Like Trout, I'm lucky to live within a mile of Stratton/The Chutes and it hit it regularly. I love climbing through Stratton, up The Chutes, and up Gold Camp Road to Spring Creek and down Columbine--great, quick loop with lots of variety. However, the one I can ride from my house that is my fave is Section 16 via Bear Creek Regional Park and Stephaine's Trail. Similar distance and elevation change as Trout's two lap route, but the added bonus of an extenden, gnarly douwnhill. I also think of Palmer Park and Cheyenne Mountain State Park as my home trails--they are my son's favorites, so we hit them often as well.
Prior to settling in Colorado Springs ('08 - '10), I lived in in Fairfax Co. Va. in the middile of a triangle formed by what were my three home trails; Wakefield and Accotink Parks, Laurel Hill, and Fountainhead, each of which had it's own unique attributes.
Before that ('06 - '08), I lived in Great Falls, Mt, where my only worthy "home trail" was the Norht Shore trail along the Missouri river. However, there were oodles of great rides within an easy day trip.
When I bought my first bike in '00, I was living in Cheyenne, Wy, where my home trail was the Headquarters Trail/Happy Jack trails. After I left, locals got a great addition and the fantastic trails at Curt Gowdy State Park is the new home trail for most Cheyenne and Laramie Riders.
During my exile in Minot, North Dakota, the local trail was the Bison Plant singletrack.
Subsequent to that, for my time in Dayton, Oh, my "home trail" was John Bryan State Park, although it was only another 20 minutes to the far more interesting Ceasar Creek State Park, so I usually took the extra time in search of some level of challenge.