Like M.I. said, it is a great hike to continue up the Castle Canyon Trail from Echo Mountain to Inspiration Point, and make a loop coming down. The Lower Sam Merrill Trail is also a great night hike.
I work right around here so I try to get up here twice a week or so to run this one.
On the way to Mt. Lowe.
A favorite easy trail run to the summit. For more of a workout, if I have time, I continue up the Castle Canyon Trail to Inspiration Point. Rather than back-tracking, I usually return via the Middle Sam Merrill Trail to Echo Mtn. adding an additonal mile on the return.