This is supposedly a 213 acre park that includes a network or trails and a remote control airplane area. The trails are all double-wide for the most part with some steep, rocky sections and one really narrow bridge (a fence post) over a shallow gully. Great workout and views. Definitely a hidden gem that I did not know about and have lived nearby for 4 years.
Naranja Park is not a well-known park but it is still undeveloped and has some nice trails with a lot of variety. Head north on La Canada Blvd. to Naranja Road, turn east and go about 1 mile to find the entrance to the park. There are actually 5-6 different entry points if you are on a bike, but only one for a car. Look for the signs for the park. Many of the entry points have trail maps so you can orient from there.
http://www.singletracks.com/item.php?c=1&i=5010