Mined from about 10,000 B.C. to possibly the 1800s, these quarries yielded multicolored flint highly prized by ancient man for tools and weapons. Still under development by the National Park Service, entry to the monument is by ranger-guided tours only. Tours, limited to no more than 25 persons, are conducted from Memorial Day through Labor Day at 10 a.m. and 2 p.m.; by reservation only rest of year; tours originate in Bates Canyon off Texas 136 about six miles south of Fritch. Collecting flint specimens is prohibited on monument grounds. Inquire locally about other outcroppings where collectors may find specimens.
