If you take Freitas Parkway from Hwy 101, and follow it all the way until it dead ends, then park - you will find a paved trail that goes over the hill to Sleepy Hollow.
At the highest point of this trail, turn right and follow the road up to the fire road. It goes all around the back end of Terra Linda and over the ridge between TL and Lucas Valley.
From our walks of: 3/18/15, 11/19/14, 2/5/14, and 10/17/12.