Run between the international airport and the city's most prominent building, Petronas Towers which were the tallest in the world from 1998-2004 and have become something of a Malaysian national symbol.

Here's Greg Nance's route:

Running between Singapore's international airport and Marina Bay Sands, the city's most prominent building, which is featured on most of Singapore's postcards and has become the celebrated landmark.  About 17km.

The Southwest Face route (which has also been called the Weenie Route or the Beanie Route) is as follows:

20 miles of trail, 20 years in the making.