Kawilinau (Bottomless Pit)

Embark on the difficult Sliding Sands and Halemau'u Trail Loop, a challenging hike spanning 14.2 miles (22.8 km) with a significant elevation gain of 2986 feet (910 metres). This route takes you through an otherworldly volcanic landscape, often likened to Mars, where vibrant red, orange, and black soils dominate the scenery. You will traverse diverse terrain, from sandy paths to 'A'ā lava flows, and pass dramatic cinder cones. The estimated duration for this demanding journey is 7 hours and 13 minutes, offering ample time to immerse yourself in the unique environment of Haleakalā crater. Look for rare silversword plants and features like Kawilinau, also known as the "Bottomless Pit", as you explore.

Since this is a point-to-point hike, you will need to arrange transportation between the trailheads, perhaps a shuttle or by hitchhiking. Be aware that starting at nearly 9,740 feet, the high altitude makes the hike more demanding than usual. You should prepare for faster dehydration and fatigue due to the elevation. Always consider the difficulty and distance of the Sliding Sands Halemau'u loop when planning your trip.

This trail offers a deep dive into the unique geology of Haleakalā National Park. The landscape is shaped by ancient volcanic activity, creating a stark yet beautiful environment. You will encounter diverse terrain, from fine sandy paths to rugged 'A'ā lava flows, showcasing the raw power of nature. The crater itself is a geological marvel, providing a rare opportunity to experience an ecosystem unlike any other.

Embark on the Halemauʻu Trail for a difficult hike that plunges you into the heart of Haleakalā crater. This 12.5-mile (20.2 km) route involves a significant descent, gaining 2246 feet (684 metres) in elevation, and typically takes around 6 hours and 8 minutes to complete. You will navigate steep switchbacks, transitioning from upland forest to an otherworldly landscape of loose lava rock and cinder cones. Keep an eye out for the vibrant hues of Pele's Paint Pot and the distinctive Haleakalā silversword plant as you explore this unique volcanic terrain. From viewpoints like Panoramic Views, you might even catch glimpses of the Maui coastline on clear days.

Planning your visit requires preparation for high altitude and unpredictable weather; bring plenty of water, sun protection, and rain gear. While day-hiking permits are not needed for the trail itself, access to Haleakalā National Park before 7 AM does require a permit. Be ready for rapidly changing conditions and consider acclimating slowly to the elevation. Always check park conditions before you go.

This trail offers a unique opportunity to experience the vast Haleakalā crater from within, showcasing its distinctive volcanic environment. You will encounter an otherworldly terrain shaped by ancient eruptions, featuring loose lava rock and striking cinder cones. The presence of the rare Haleakalā silversword plant further highlights the ecological significance of this protected area within the national park.