ONLY PARK THAT I KNOW IS ABSOLUTELY OPEN BECAUSE I MANAGE IT:
WHERE TO MEET: at the Rocky Peak trailhead parking area located at the SOUTH end of the Rocky Peak offramp bridge at the 118 freeway, at the intersection with Santa Susana Pass Road.
DISTANCE: 4 miles. Difficulty: moderate. Hike is all on trails and monkeying around on the nearby rocks is optional. Elevation gain is 500 feet
Everyone must sign a liability waiver....yup, Damn lawyers, because this 120 acre preserve is private property, and it does not have the automatic liability immunity which public parks have.