Alpine Trail begins in Stanford Campus, passing down Sand Hill Road, West to Alpine Road. From there, the trail continues along Alpine Road through Portola Valley.
I recommend accessing the trail from Stanford Campus at the junction between Oak and Stock Farm Roads. Park along the street. For directions, use Mapquest's Map of Oak Rd & Stock Farm Rd Stanford, CA 94305, US
Alpine Trail can be accessed at multiple other locations along its length. Most parking is along the road or one of the cross streets to Alpine Road. However - be forewarned - the trail is not well maintained West of Santa Cruz Ave and runs dangerously close to busy Alpine Road. Traffic gets quieter in Portola Valley, but the trail still tends to be narrow and poorly maintained, here. It becomes dirt just West of downtown Portola Valley.
This trail is not restricted to any time or season.
None.
The path is steeply graded only at the intersection of Sand Hill Road, Santa Cruz Ave, and Alpine Road, so this segment is not recommended for wheelchairs. There are not parking or bathroom facilities for the trail. Other parts of the recommended route seem suitable for wheelchairs. Parts of Alpine Trail West of Santa Cruz Ave are narrow and roughly paved, so are not recommended for wheelchairs.