Watch raw video of the rock slide

VANCOUVER, British Columbia (AP) - A massive rock slide has blocked the only direct route between Vancouver and Whistler, the main corridor for the thousands of people who will travel between the two main venues for the 2010 Olympic Games.

An entire cliff face collapsed onto the Sea-to-Sky Highway late Tuesday night, stopping traffic on the busy thoroughfare along the coast north of Vancouver.

The Royal Canadian Mounted Police said provincial Ministry of Highways officials were at the site, determining the stability of the remaining cliff still perched over the highway.

There were no reports of injuries, but officers from the RCMP and Canadian Coast Guard were searching the area to make sure no vehicles were caught, the RCMP said in a statement.

Transportation Ministry spokesman Jeff Knight said Wednesday that the road would be closed until further notice because it's too dangerous for crews to get through.

The rocks crashed down just after 11 p.m., covering the north and southbound lanes near Porteau Cove, south of Squamish. Debris across the road and nearby railway tracks was up to 30 feet deep and 100 feet wide in places.

The indefinite closure of the winding and scenic road leaves just one route from the Whistler and Howe Sound area to Vancouver, a seven- to eight-hour drive through Duffy Lake.

The province is spending $750 million to improve the Sea-to-Sky Highway, both for expected Olympics traffic and for safety reasons.

The upgrade was a major factor in the International Olympic Committee's decision to award the Games to Vancouver and Whistler.