The trail is in very good shape. It's a bit of a roller coaster ride but total mileage and gain on a round trip starting at Eaton Canyon Nature Center is only about 7.5 miles and 1500'. Can be combined with some urban street walking to get to the Sam Merrill Trail at the top of Lake Ave. which leads up to Echo Mt. and beyond (eventually the ACT will connect directly with Rubio Canyon and the Sam Merrill trails).
Google Earth view (Yellow is the Loma Alta segment of the ACT), blue is in Eaton Canyon...

This is a view up the canyon just east of Rubio Canyon. Rumor is there is gold up in them thar hills...

Trail head at the Zane Grey Terrace access point (the western terminus of the Loma Alta segment)...

A memorial to two fire fighters on the trail...
