Get onto North Mathilda Ave from 237 or 101, and head north.
Take a left onto First Ave, which is past Lockheed Martin Way and past Java Drive.
Take an immediate right turn to the Yahoo HQ guard shack. You'll take another right through the parking gate, and around to Yahoo's multi-level parking structure.
Parking Level 1 has a door into Building C's ground floor and our registration area.
Parking Level 2 has a door to the upper-level classrooms. Registration is down one flight.