San Jose Avenue and Geneva (Balboa Park Muni Metro/BART) via San Jose Avenue, Ocean Avenue, Junipero Serra, West Portal Avenue to West Portal Muni Metro station (headsign changes to T-THIRD STREET), then via Twin Peaks tunnel, Market Street subway to Embarcadero Muni Metro/BART.
From Embarcadero Muni Metro/BART via Market Street subway, Twin Peaks tunnel to West Portal Muni Metro station, then via West Portal Avenue, Junipero Serra, Ocean Avenue, San Jose Avenue to Geneva (Balboa Park Muni Metro/BART).
Muni Metro stations served: West Portal, Forest Hill/Laguna Honda, Castro, Church, Van Ness.
Muni Metro/BART stations served: Balboa Park, Civic Center, Powell, Montgomery, Embarcadero.
Owl service: see 91-Owl and L-Owl.