Beginning in the late 1890s, battles erupted along Baltimore’s racial frontiers as African Americans moved into predominately white neighborhoods. This article analyzes the fight to impose residential segregation by focusing on events on the streets. This vantage point reveals a fuller picture of the movement to impose legalized segregation in Baltimore. Attempts to maintain racially exclusive neighborhoods in Baltimore began years before the passage of the West Segregation Ordinances in 1910. A street-level examination emphasizes the violence and racism—often elided in top-down analyses—that were central to the push for legalized segregation. It also demonstrates the significance of grassroots activists in this story. The movement to impose residential segregation was both promulgated and opposed at the grassroots.