Quebrada Mejillones is a 20-kilometer waterway located on the northern part of the Mejillones Peninsula in Chile's Antofagasta Region. The water body is described as a dry streambed, indicating it is likely an intermittent or ephemeral watercourse, characteristic of the arid climate of northern Chile. This suggests the paddling experience is highly dependent on seasonal rainfall, and water levels may be low or nonexistent for significant portions of the year. The waterway flows through the Antofagasta subregion and has a network of two distributaries and one tributary. The surrounding landscape is part of the Mejillones Peninsula, which typically features a coastal desert environment. Recommended routes and access points for water activities are referenced on certain paddling and fishing resource websites, but detailed descriptions of these amenities are not provided. The overall character of paddling here would be defined by the stark, dry beauty of the Atacama Desert coastline, but paddlers must be prepared for the possibility of a waterless channel and should prioritize verifying current water conditions before any trip.