Best Oahu hikes: For US hiking trails in Hawaii, there are tons of hikes on Oahu to choose during Hawaii vacation on the island! Doing the best hiking trails on Oahu also gives you other things to do with nearby beaches for swimming, snorkeling, and to see turtles! List of planning tips for when in Waikiki or Honolulu and take the bus or with a rental car to other trails. Outdoor travel destinations for the bucket list for budget adventures! Put outfits and hiking gear on the packing list!