This is a point-to-point trail over 8 miles long. You can start at Genessee Mountain Park or Lookout Mountain Park. It doesn't cross roads for any of its length and feels pleasantly remote. You can run the whole thing (with a pre-arranged shuttle at the other end), or do shorter out-and-back sections, or construct loops with other trails and return to your starting trailhead.
This is considered one of the best running trails in the foothills of the Front Range.