The steep road into the valley (an abrupt 25 percent grade) keeps most visitors away from the valley floor unless they have four-wheel drive, are in condition for a hearty hike, or decide to ride down with an outfit such as Waipio Valley Shuttle or Waipio Valley Wagon Tour. Please do not take your rental car down the steep path as you will literally be stuck in Paradise or even worse, you could endanger yourself and others.