So I dont forget where they all are!

 

Here is a link to where I think the trailhead is.
http://topozone.com/map.asp?z=13&n=4377780&e=306455
It's hard to tell exactly where it is based on this map. I know you go up
through Red Canyon to the flat part of the road. Then turn left on Lookout
Mtn. Road. Which is a good size dirt road after some dumpsters and mail
boxes. Then you wind around on the dirt road a few miles until you see the
large trailhead on the right with BLM bulletin boards.

Follow route 82 through Glennwood Springs towards Aspen and take a left at
the second traffic light *outside* of Glennwood Springs. This will be near
the settlement (town?) of Cardiff. You will see a sign for the Colorado
Mountain College on the right side of the highway indicating the turn you
need to make. This will be CMC Circle. There is a very small shopping
center with a gas station on the right just after you make the turn up the
hill. You will see it from the intersection.

Follow CMC Circle to a fork in the road. Bear left onto Red Canyon Circle.

Follow Red Canyon Circle for a few miles (sorry, didn't measure it). At
some point you will be at the top of a hill where you will see a bunch trash
dumpsters at the bottom of the hill. County Road 120 will be the on the
right *before* you reach the dumpsters. There is a crude hand painted sign
with "Road 120" painted with spray paint.

Turn right on County Road 120 and follow it up the hill. About a mile or so
partway up the hill will be a road on the right. That will be the road to
the parking lot and the trailhead.

Quoted by Chris -"Turn right on County Road 120 and follow it up the hill."

Chris,
One correction. You turn right LEFT after the dumpsters, onto Lookout Mtn
Rd., to get to the trailhead.