The trailhead is the point at which a path, usually intended primarily or solely for walking and/or horseback traffic, starts. Modern trailheads often contain rest rooms, sign posts and distribution centers for informational brochures about the trail and its features, and parking areas for vehicles and trailers.

Historically, the cities located at the terminus of major pathways for foot traffic such as the Natchez Trace and the Chisholm Trail were also known as trailheads.