"Just 20 minutes north of Whistler is Nairn Falls Park. This park provides a good base camp for exploring Whistler, the Pemberton Valley or nearby Garibaldi Provincial Park. It is an excellent overnight stop before continuing onto the Duffey Lake Road or points north or south. The falls are 60 m high and a 1.5 km hiking trail will take you to the viewpoint."

Official web site http://wlapwww.gov.bc.ca/bcparks/explore/parkpgs/nairn.htm

There are three parts to the falls as shown below (1) where the falls comes through a narrow passage then goes underground to (2) come out from under the rock, then go around and down to the final part of the drop (3)