Intersectional analyses of gender, sexuality, and migrations have been central to feminist and queer theorizations of the state in historical perspective. In the twenty-first century, mounting deportations and mass incarceration—mostly of brown and black men—have elicited growing scholarly concern about the intersections of gender, race, and increased state coercive power under neoliberalism, including the emerging field of detention studies. However, the increasing displacement of trans subjects in the Americas, and what their embodied experiences of migration tell us about the changing nature of state sovereignty at the border and beyond, remains undertheorized. Based on participant observation and interviews conducted with chicas trans at migrant shelters in Mexico, this study sheds light on how gender and geographical transitions shape each other, blurring distinctions of shelter and homelessness, motion and boundedness, and freedom and unfreedom. It reveals counterintuitive inversions and sites of confinement beyond the walls of strictly carceral facilities, even as rates of migrant detention and imprisonment have increased dramatically in both Mexico and the United States in the past few years. Drawing on these findings, I propose the notion of “confinement in motion,” a state that persists even when the subject is not traveling through space in an ordinary sense. I further argue that, while the requirements of global accumulation continuously set people in motion, migratory flows have not remained undisciplined but have been incorporated into contemporary global governance through a carceral regime of sovereignty that exceeds the state.