A: The Kohala Ditch began life as a natural waterway whose headwaters originate high in the lush Kohala Mountain forests. Over a century ago, sugar farmers built manmade waterways to divert this precious resource to their sugar cane fields below. For over a century, these natural and manmade waterways have delivered crystal-clear, mountain spring water to the valleys below. And although the sugar plantations no longer rely on them, the Kohala Ditch is a fun way to spend a few hours floating down the mountainside, through lush jungles and past sparkling waterfalls. Great for all ages, the tours are a unique way to explore authentic Hawaii.