HomeUSASouth DakotaCuster State ParkSylvan LakeSylvan Lake BoulderingDay Use AreaPerch BoulderPerch BoulderLAT,LNG 43.84547, -103.55985CREATED UPDATED Edit MapShareDescription[Edit]Nice and shaded with some great rock quality. Check out the fun lower grades on backside and then head to the phenomenal Grundle Crunch on front.3 ClimbsComing soon: New Climbs1Kief CrackV1Bouldering2Johnny's AreteV1Bouldering3The PerchV4Bouldering