approx. 15 miles
I tried to ride on a trail that goes through Yorba Linda. It seems to be primarily a horse trail, but there is a paved lane that is marked as "Bike Lane." It is a very winding trail with many sharp turns, a lot of street crossings, pedestrians, and horses. For those reasons and because I was not very motivated, I did not ride very fast.
One point of interest: I rode past the Richard Nixon presidential library and more specifically, I rode right past his helicopter that was parked behind it.