Hey! I HIKE up Page Mill from Arastradero to Foothills Park and then come back down through the Arastradero Preserve. You think it’s tough passing a bike? Try being a pedestrian.
There is very little difference between the two at elevation just about 900 feet :-) Except that bicyclists also carry fifty pounds of metal under them :-) and they can't look around, lest they lose whatever little balance they have. More than once I saw bicyclists pushing their bikes up the hill. But they say it's good for them. Whatever :-)