Napa native and current vice mayor Scott Sedgley is a bit of a history buff. His community involvement includes three decades as a docent at Bale Grist Mill State Historical Site in St. Helena, and he currently holds a position on the board at the Napa County Historical Society. This week, Sedgley invites the public to join him on the Riverboat Captains and Mansions Walking Tour in Napa’s historical Abajo neighborhood. Sedgley will offer stories about the era when riverboats plied the Napa River, and point out the spectacular centuries-old homes that are still standing. Revisit the past on Saturday, March 7, at Napa River Inn’s Hatt Building, 500 Main St., Napa. 10am. $5–$10. 707.255.1836.