HomeUSAColoradoBoulderBoulder CanyonPractice RockLeft Crack5.8+Regular Route5.11b5.9+tradtrFA Mark Wilford and Ken Duncan, 1977.UPDATED BY vietnguyen Tick this climbDescriptionRoutes in Practice Rock1Left Crack5.8+Tr2Thin Crack5.9+Trad · Tr 3Regular Route5.11bTrad · Tr4Lieback5.10-Trad · Tr