Dan L.
Yelp
The Eaton Canyon Trail is great for beginners and those who are not in the best physical condition. It is only 1.43 miles long, and the main trail's steepness is rated from gentle (0-10%) to moderate (10-15%), never steep (15%+). Easily completed, even if one is out of shape! :D
A side trail will lead to lead to the scenic Eaton Canyon Falls, where everyone seems to want to pose for a photo.
If you are an experienced hiker and in peak physical condition, you can continue onto the Altadena Crest Trail, which begins at the north end of the Eaton Canyon Trail.
Speaking of which, I always park at the public lot in the south end of Eaton Canyon Trail, and work my way north. However, there is also a pedestrian entrance at the north end of the trail, from which you could work your way south (or start the Altadena Crest Trail instead, if you want a *far* more challenging journey).
Sadly, from what I saw, a number of visitors on the trail are failing to police their trash, not to mention the feces from their dogs. Watch your step on the trail so you don't tread on said feces.
P.S.
It's probably safest to come with companions and stay on the (main) trail - I made the mistake of wandering way off the trail, and had a strange and terrifying encounter with what was probably most accurately described as a mentally ill vagrant (nothing serious ultimately came out of it, but I'd rather not repeat that traumatic experience).