We'll meet at the Clark Trailhead, one of many entrances to Alvarado Regional Park. We'll park carefully at the end of Clark Rd. which is also the beginning of the trailhead, by a Waldorf school. There will be no shade for a while, no bathrooms and no water. There isn't a parking lot either, and the sign indicating the trailhead is limited to a warning about cattle. But Clark Rd. does not go anywhere else, so it is easy to find. Be ready to carry your gear for about 15 minutes from the park's entrance.
Directions: From 80, take the San Pablo Dam Rd past El Portal, Appian/La Colina, and Milton Dr. The next entrance to your right is Clark Rd. If you live in Berkeley, you can also take Wildcat Canyon Rd to San Pablo Dam Rd and make a left on Clark Rd.