HomeUSAMarylandPatapsco Valley State ParkAlbertonAlberton BouldersProw (Alien Boulder), TheProw (Alien Boulder), TheLAT,LNG 39.31519, -76.79466CREATED UPDATED Edit MapShareDescription[Edit]Watch for choss on any holds that haven't been obviously used.3 ClimbsComing soon: New Climbs1Alien AreteV4Bouldering2Alien StandV3Bouldering3Sitting AlienV3-4Bouldering