JESSE ARROYO. Jesse Arroyo rises in east central Donley County (at 34°53' N, 100°33' W) and runs northeast for nine miles to its mouth on the Salt Fork of the Red River, twenty miles northwest of Wellington in west central Collingsworth County (at 35°00' N, 100°31' W). The arroyo rises in flat to gently sloping terrain and traverses an area with soils ranging from loose sand to clayey and sandy loams. The surrounding vegetation varies from scrub brush and grasses to water-tolerant hardwoods and conifers. The arroyo was part of the RO ranch pastures.