My friends and I rode our mountain bikes back there back in the 1990s. I haven't been back there since but it was an good ride more or less back then. The tricky point is that river that is often low but become very overflowing at times. That river can trap you and that leads to panic among the trapped. The river flow will died down and they can wait several hours or night if you come prepare. No need to rush down there to rescue people unless its life or death. Most of the time, we rescue people so they can go home in time to watch their latest reality show!!

I remembered a group of tourists got lost hiking in the trail among Oahu's mountains, it was getting dark so Search and Rescue called it off for safety reason although they located the unharmed lost tourists.  Families of the tourist whine that their lost family members will starve to death if not rescue immediately and one member of the S&R responded..."After only one night??" That ended that whine!