HomeUSASouth DakotaNeedles Of Rushmore, TheMount Rushmore National MemorialOlton's ShoulderOltons Shoulder BoulderingOltons Shoulder Roadside DrainageSlick Mantra BoulderSlick Mantra BoulderLAT,LNG 43.88219, -103.46699CREATED UPDATED Edit MapShareDescription[Edit]Largest boulder in this set of boulders. Has a massive clean cut highball north face that isn't climbable. Would be world class if it did go!1 ClimbsComing soon: New Climbs1Om AreteV1Bouldering