ONION TOP. Onion Top, formerly called Kinchelo Peak, is five miles southwest of Adamsville in northern Lampasas County (at 31°17' N, 98°15' W). At an elevation of 1,445 feet above sea level, its summit rises 125 feet above nearby Kinchelo Creek. It stands in an area of the Grand Prairie region characterized by steeply to moderately sloping hills and shallow stony, sandy, and clayey loams. Vegetation consists primarily of grasses and open stands of live oak, mesquite, and Ashe juniper.