If you parked on Mission Blvd, then walk along the sidewalk parallel to Pine St until you a sign for Mission Peak Regional Preserve (0.3 miles). Then follow Peak Trail all the way to the summit (3.2 miles). From Mission Peak summit, continue south along Bay Area Ridge Trail (2.4 miles). I really like this section of the hike — the views on either side of the trail are awesome and elevation gain is little.
There are several unmarked intersections along the route. So a trail map would be handy.
There is a restroom, conveniently located about 0.7 miles away from Mission Peak (see trail map for is location).
From I-880 North, take exit 12A and merge onto Mission Blvd toward Sacramento / I-680. Continue for 2.2 miles along Mission Blvd. Ohlone College lies at the intersection with Pine St. According to instructions here, you may park in lots M, N, O or P for fees collected at vending machines. For locations of these lots, see Map of Ohlone College. One may park on Mission Blvd itself, then walk 0.3 miles along Pine St to reach the trailhead for Mission Peak. There are signs along Pine St.
Parking Fees: None if you park on Mission Blvd. Paid parking in lots M, N, O or P in Ohlone College (as per the official trail map). (last visited: February 2013)