Haleakala National Park is 31,083 acres of protected area that extends from the summit of Haleakala at 10,023 feet down to sea level. This extreme change in elevation means that a wide variety of ecosystems are included in the park, with diverse plant and animal populations.
The park brochure explains why it is so important to protect this area. There are at least 1000 native species of flowering plants in Hawaii. 90 percent of these are endemic, found only in Hawaii. Of these, 10 percent are extinct and 30 percent are threatened or endangered. As far as native bird species go, there are 140 kinds but 85 are now extinct and 32 are endangered. Introductions of non-native, invasive plants and animals are the number one threat to Hawaiian ecosystems.
The main area of the park is the Summit District, which includes Haleakala "crater." This area can be reached from Kahului by taking Highway 37 to Highway 377 to Highway 378. The drive will take about 2 hours from most resort locations.
Haleakala (House of the Sun) is a shield volcano that rose from the sea 900,000 years ago and continuously erupted until 400,000 years ago. The most recent eruption is thought to be in 1790. The original mountain was actually a few thousand feet higher, but has eroded to it’s current elevation. Haleakala crater is not really a crater at all, but rather a valley created by erosion. The valley is 2.5 miles wide and 7.5 miles wide, and it filled with cinder cones, volcanic rock, and beautiful silversword plants.
You can look into the valley from the Visitor Center near the summit. The Visitor Center(6am-3pm) is the place to get park information, purchase books, and find out about ranger-guided hikes and talks. Summit talks are given daily at 9:30am, 10:30am, and 11:30am. Cloud forest hikes are given Monday and Thursday at 9am (3 hours, 3 miles, leave from Hosmer Grove), and Cinder Desert Hikes are given Tuesday and Friday at 9am (2 hours, 2 miles, meet at Sliding Sands trailhead). These guided activities are FREE, and from my experience are always excellent. Also ask about the Junior Ranger program for the kids!
Or you can hike on your own. See my separate hiking entry for information. Free camping on a first-come, first-serve basis is available at Hosmer Grove. There are backcountry campsites available by permit, as well as backcountry cabins for rent. See the park’s website for more information. Other popular summit activities include biking down the mountain and watching sunrise on top of Haleakala. Sunrise-watchers should dress warm and bring a blanket!
The other main area of the park is the Kipahulu District on the far east side of Maui. This is the wetter side of the mountain, and features rainforest and waterfalls as the star attractions. However, it is a significant excursion to get there. See my journals on Hana, Maui for information on hikes, ranger programs, camping, and swimming at Kipahulu.