Shannon Falls Professional Review and Guide
"It is pretty safe to say that everyone who has traveled Highway 99 to Squamish is aware of these falls where Shannon Creek plunges down a nearly vertical cliff before resuming its more placid course to Howe Sound.
But what can you do once you have paid your respects to the gods of the waters from the viewing platform? Well, having admired the overshot water-wheel on the way up, you may look at a few more artifacts by staying right on leaving the platform, then turning right again on the road that goes north from the picnic area.
Nor is that all; continuing north, you find yourself on a trail created by the Federation of Mountain Clubs to Olesen Creek, with perhaps a trip to the top of the falls thrown in. At first your route stays relatively level, as you keep right at one fork and enter the valley of Olesen Creek, but then comes a change as the grade becomes steep indeed, and you mount on steps that might have been designed for giants, gaining altogether some 75 m (250 ft)."