We’ll meet at a trailhead in Lucas Valley (elevation 150 feet), and then carpool up to the Big Rock trailhead (650 feet). It sounds like a nice 500 foot stroll downhill, but we will have to go over (or around) Loma Alta along the way, so pack some extra water and an energy bar for this 7.5 mile walk that will include the beautiful new 680 trail. This walk is for adults. We request that no animals (except service animals) attend. Heavy rain may cancel. If questionable weather, call (415) 893-9527 on the morning of the walk for a recorded message to see if the walk is cancelled. David Herlocker will lead. Questions: Contact David at (415) 893-9508 or DHerlocker@marincounty.org.