The Los Altos Hills to the Sea Run/Hike Marathon (26.9miles) is a one way trek from the Los Altos Hills Purissima Park to the Half Moon Bay Poplar Beach at the ocean. This route is being as an event or also a hiking route for anybody to use at anytime. This self supported trek is designed to be a non competitive completion event where your reward is enjoying the trails and company of your fellow runners and hikers.
Route: The route attempts to use as many pathways, trails as possible and crosses several town trail systems, and county parks and mid pen open spaces.
Distance: 26.9 miles
Elevation Gain: 2983
Elevation Loss: 3246
Returning back to the starting area: TDB – The route finishes in Half Moon Bay. There are public buses that go from Half Moon Bay back to the Los Altos area or you can arrange and share a shuttle among your friends.
Sam Trans Bus Schedule –
On weekends, there is a bus that runs hourly from a bus stop near the end of this route called Bus Route 294 that will take you to the Cal Train Station at Hillsdale. From Hillsdale you could take Cal Train to PA or MV near Los Altos.
Here is the information on that bus schedule.