The treacherous mountain bike trail at Bukit Timah Reserve This mountain bike trail at Bt Timah is treacherous and dangerous. On rainy days the track is slippery. You will cycle on jungle terrain and climb up and down steep slopes. Only those below the age of 50 are advised to cycle on this track. Along the track you will see plants, trees, flowers and animals like skink, green dove, monitor lizards and squirrels. It is very cooling to cycle in the jungle even on a hot day. I came across the heliconias and the tree called the African tulip with its scarlet flowers.