Directions: From Interstate 84 take Exit 57 (Gowen Rd.) and head toward Idaho City. After you go about 24.5 miles you will come to Grimes Creek RD. (mile marker 29). Take a left and head towards Centerville. After about 2 miles the road will turn to dirt, keep to the right and head towards Centerville. Rock the Mountain will be located at Rye Flat at mile marker 8.