Using randomized experimentation, this study of a municipal election in Central California examines the effects of face-to-face canvassing on voter turnout. This is the first randomized experiment to focus on Latino voter mobilization. Building on previous field experimentation, this study focuses on a local school board election held in Dos Palos, CA. Two kinds of appeals were made to potential voters: one emphasized ethnic solidarity; the other emphasized civic duty. Canvassing was remarkably successful; voters who were contacted were significantly more likely to vote. The mobilization effort had a particularly large effect on the turnout of Latino Democrats.