It was Baldwin who came up with the name of "Glen Park" for the district. The first use of “Glen Park” was when Baldwin announced the organization of the "Glen Park Company" in 1897, with the sole purpose of opening and managing a zoological gardens. His 145-acre pleasuring grounds and zoo became known as "Glen Park and the Mission Zoo". Opening in 1898, it attracted 8,000 to 15,000 people each weekend for its vaudeville shows, daring aeronautic displays, sporting events, and animal exhibits. In 1899 with the pleasuring grounds a success, Baldwin began auctioning his home lots, "Glen Park Terrace", located along Glen Avenue (today’s Chenery Street between Diamond and Elk Streets). Because of difficulties encountered in the management of "Glen Park and the Mission Zoo", as well as weak sales of "Glen Park Terrace" home lots, Baldwin divested all of his holdings in 1901, with much of the land being transferred to the California Title Company and the Crocker Estate. The Crocker Estate would continue to manage the main grounds of "Glen Park and the Mission Zoo" in today’s Glen Canyon as a private picnic and pleasuring grounds until 1922, when the land was finally transferred to the City and County of San Francisco. They began releasing home lots surrounding Glen Canyon after the San Francisco Earthquake in 1906, when the population of Glen Park exploded with new residents who had been displaced by the catastrophe.