Be sure and check that the park is open before you go. The following is from the
TPWD site:
Please Note: From December 2001 through February 2002, the Texas Department of Transportation will be performing major repairs to the roadway going down the hill into Palo Duro Canyon. Because of this, no vehicles or persons will be permitted to go beyond the rim of the Canyon. This pertains to vehicles, bicycles, horses, and foot traffic.