Most undocumented aliens enter the US by?

Most undocumented aliens enter the U.S. by crossing the border with Mexico, often using remote areas to evade detection. They may also enter legally with temporary visas and then overstay their permits. Factors such as economic opportunities, family reunification, and escaping violence in their home countries drive many to undertake this journey. The methods and routes can vary depending on individual circumstances and changing Immigration policies.