While the 2018 Champion is yet to be determined (between the Philadelphia Union and Houston Dynamo of MLS), 2019 qualifying is around the corner. Several teams from the San Francisco Bay Area will begin play next month. Qualifying begins September 22-23, with the winners advancing October 20-21. Play continues in November, before resuming in March and April.
(SF City FC (PDL) vs CD Aguiluchos (NPSL) – US Open Cup 2018)
Listed by League (Sanctioning Body) Affiliation – San Francisco Bay Area teams:
LIGA NorCal (US Club Soccer)
Academica Soccer Club; Turlock, Calif.
Contra Costa FC; Walnut Creek, Calif.
Davis Legacy; Davis, Calif.
San Francisco Soccer Football League (Calif. Soccer Assn.-North/USASA)
Oakland FC Leopards; Lafayette, Calif.
United Premier Soccer League (U.S. Adult Soccer Assn.)
JASA RWC; Redwood City, Calif.
Napa Sporting SC; Napa, Calif.
Oakland Stompers; Oakland, Calif.
Real San Jose; San Jose, Calif.
San Ramon Dynamos FC; San Ramon, Calif.
Source (ussoccer.com)
The NPSL, PDL, USL, and MLS brackets will be determined next year.