The Fullerton Loop is a complicated series of trails that follow parks and greenbelts throughout the city of Fullerton. It's best to go with someone who has been before since there are several different routes. Don't expect any spectacular views or an epic ride, I would call it more of an after work ride. It's still fun when you know where you're going. It's also great for night rides.
I'm not sure of the length, I believe it is about 15 km.
The trail head is located in the southeast corner of the Fullerton Court House parking lot near the corner of Harbor Blvd and Berkeley.
Exit the 91 Freeway at Harbor and head North on Harbor. Turn left on Berkeley and turn left into the first driveway for the court house. The trail will be on your left as you enter the parking lot. You will usually see cars and groups of mountain bikers.
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