I did this hike 2 years ago and I've been wanting to go back ever since. I think it's the prettiest hike in LA, with amazing foliage, variety, and a delightful reward at the end. The only downside to this hike is that the trailhead is in the middle of a quarry, so you have to take a shuttle to get to it and the shuttle only runs about 30 Saturdays of the year, which equals a usually busy trail. If you go early in the morning, around 7am, this is the best way to avoid crowds.
Anyways, here are my pictures from our most recent expedition: