HomeUSASouth DakotaCuster State ParkSylvan LakeSylvan Lake BoulderingAcid Test Boulder5.11c/dtradtrFA TR Mike Todd & Mark Smedley 1978 First Ascent: On-sight free solo Charlie Fowler 1983UPDATED BY vietnguyen Tick this climbDescriptionRoutes in Acid Test Boulder1Acid Test5.11c/dTrad · Tr