This is an OHV area and the trails can be rutted, eroded, and there can be quite a lot of traffic; not always awesome for running.
Holman Ridge - Cabin Flat #172 is the extension of Old Trench Road #181
. This route is very steep with a section of sustained grades of 18-22%. It is also very rugged with rocks and a loose tread surface. In other words, it's not everyones idea of a good time.
This is a good bail-out option from Holman Trail #039
to access Mill Canyon #40