EMERGENCY services were involved in a 12-hour rescue yesterday after a man fell down a rock face at the Grampians National Park.The 42-year-old man was hiking with a group of friends when he fell down a rock formation called The Fortress at 11.15am.Ambulance Victoria spokesman John Mullen said the man fell 12m and landed on a ledge, half-way down the 140m drop.He said emergency services planned to winch the man up but considered it too dangerous."Police Search and Rescue made their way down to the ledge and lowered him to ground crew at the bottom," Mr Mullen said."The plan then was to walk him out to a track, which took another hour, and bring him to the Halls Gap football oval and airlift him to Melbourne."The man was conscious throughout the rescue and suffered from chest, rib and back injuries.Police Search and Rescue Squad, SES and paramedics were involved in the rescue.Mr Mullen said the area where the man fell was the most inaccessible part of the Grampians.