The 2003 Pan American Race Walking Cup was held in two locations: both 20 kilometres events in Chula Vista, California, United States, on 15 March. The track of the Cup ran in the Marina Parkway at Chula Vista Marina. The men's 50 kilometres event was held one week earlier 15 km away in Tijuana, Baja California, México, on 9 March. Here, the track of the Cup ran in the Paseo de los Héroes, zona del Río Tijuana, and the results were extracted from the inaugural competition of the IAAF World Race Walking Challenge, which was organized as part of the traditional XXVI International Race Walking Week (Spanish: Semana Internacional de la Caminata) held annually since in 1978.