Bring snacks and plenty of water and lets hike Madonna Mountain while talking some Spanish. :)
To get there:
If you are getting onto Southbound 101 from the Marsh st on-ramp, then you would turn off to the right after a few yards into a parking lot.
If you are coming off the Southbound 101 on the Marsh st off-ramp then turn off to the left once you have made it around the first bend of the off-ramp. This parking lot is on the west side of the freeway and is where the Madonna Mountain hiking trails start.