The Colton Crossing was an "at grade" railway crossing situated in Colton, California, directly south of Interstate 10. First built in 1883, it was the site of one of the most intense Frog wars in railroad construction history, leading to a personal confrontation between famed lawman Virgil Earp and California Governor Robert Waterman. The crossing was the intersection of the tracks of the BNSF and Union Pacific (UP) railroads. Union Pacific track ran east-west at the crossing while the BNSF track ran north-south. Metrolink trains and Amtrak's Southwest Chief also used the BNSF track through the crossing while Amtrak's Sunset Limited used the UP tracks. The Union Pacific track comes from the east through the Coachella Valley and into the yard in West Colton.