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Courtesy photo Hikers discovered the remnants of a four-mile oil slick down Little Valley Wash near Escalante on Saturday. The Bu Courtesy photo Hikers discovered the remnants of a four-mile oil slick down Little Valley Wash near Escalante on Saturday. The Bu Courtesy photo Hikers discovered the remnants of a four-mile oil slick down Little Valley Wash near Escalante on Saturday. The Bu Courtesy photo Hikers discovered the remnants of a four-mile oil slick down Little Valley Wash near Escalante on Saturday. The Bu Courtesy photo Hikers discovered the remnants of a four-mile oil slick down Little Valley Wash near Escalante on Saturday. The Bu Courtesy photo Hikers discovered the remnants of a four-mile oil slick down Little Valley Wash near Escalante on Saturday. The Bu