Baja Ferries suspended their Guaymas – Santa Rosalia route in May 2021. To get from the mainland to Baja, you currently have to drive to Topolobampo or Mazatlan and take the ferry to Pichilingue Port in La Paz.
… in 2020 and hopefully again one day:
The Ferry Guaymas to Santa Rosalia Mexico transports both cars and passengers from Guaymas to Santa Rosalia,
…