Riding circuit (or being a circuit rider) is a term in the United States for a professional who travels a regular circuit of locations to provide services. The term first came into widespread application for judges and lawyers, particularly in the sparsely populated American West, who would hold court in each town in their circuit on a regular basis, perhaps once a week or once a month. Traveling judges are now rare, but the term remains in the name circuit court, commonly applied to levels of court that oversee many lower district courts. It has been proposed that U.S. Supreme Court justices should ride circuit, as they once did.
- Stras, David R. (2006–2007), Why Supreme Court Justices Should Ride Circuit Again (PDF), 91, Minn. L. Rev., p. 1710