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The 1.6-mile trail is free, safe in daylight, and easy to reach by bus, so a solo hiker can enjoy jungle scenery and a 150-foot waterfall without needing special gear or companions.
Recommended visit duration: 2-3 hours
👉 See FULL guide to Manoa Falls (solo trip)10 BEST nearby Activities
A solo visitor can surf powerful winter waves, rent a bike along the North Shore path, and chat with artists in galleries, all within a walkable, budget-friendly seaside town.
Recommended visit duration: 1 day
👉 See FULL guide to Haleiwa (solo trip)10 BEST nearby Activities
A solo traveler can rent a kayak or paddleboard, hike to Secret Falls, and explore heiau trails independently, and free lookouts are easy; cell coverage and clear signage keep it reasonably safe.
Recommended visit duration: 1-2 hours
👉 See FULL guide to Wailua River State Park (solo trip)10 BEST nearby Activities
The guided tubing and zip-line tours accept solo guests, supply gear, boxed lunch, and foster group camaraderie, so solo travelers enjoy thrill without logistics issues.
Recommended visit duration: 2-4 hours
👉 See FULL guide to Kauai Backcountry Adventures (solo trip)10 BEST nearby Activities
The paved garden trail, cultural stops, optional tours, and lifeguarded waterfall let a solo visitor explore safely and flexibly all day without needing a partner.
Recommended visit duration: 2-3 hours
👉 See FULL guide to Waimea Valley (solo trip)10 BEST nearby Activities
A solo traveler can join public UTV groups effortlessly, receives vehicle training, helmet and guide, but must be comfortable driving 3 hours on rough, dusty trails.
Recommended visit duration: 3-5 hours
👉 See FULL guide to Kipu Ranch Adventures (solo trip)10 BEST nearby Activities
Shared tours sell per seat, so a solo guest pays no surcharge, meets other travelers, uses supplied snorkel gear, and has marine restrooms, making the 5-hour cruise convenient and sociable.
Recommended visit duration: 4-5 hours
👉 See FULL guide to Makana Charters (solo trip)10 BEST nearby Activities
The half-mile loop, audio app, and optional 1871 Trail give independent travelers history, exercise, and photos, while restrooms and rangers offer support; limited shade demands water planning.
Recommended visit duration: 2-3 hours
👉 See FULL guide to Pu'uhonua O Honaunau National Historical Park (solo trip)10 BEST nearby Activities
Seasonal calm water, lifeguards, cliff jump, photo spots and bus stop make it engaging for a solo visitor, though huge winter surf and limited shelter demand caution.
Recommended visit duration: 2-3 hours
👉 See FULL guide to Waimea Bay Beach Park (solo trip)10 BEST nearby Activities
A solo traveler can surf world-class waves, photograph turtles from the cliff lookout, and use free restrooms and showers, but must respect strong currents and limited swimming areas.
Recommended visit duration: 1-3 hours
👉 See FULL guide to Ho'okipa Beach Park (solo trip)10 BEST nearby Activities