The Polipoli Spring State Recreation Area, or Polipoli state park, is a state park on the island of Maui in Hawaiʻi. It is part of the 21,000-acre (85 km2) Kula Forest Reserve on the slope of Haleakalā. The park occupies the slope of Haleakalā which does not have a paved road reaching to the top and thus does not reach the crater. However, there is a trail blazed through the park that does reach up to the crater. This road can be treacherous (and is strictly a four wheel drive-only expedition), and at times, the forest service will block off the last 2 miles (3.2 km) of the road, which lead to the crater.
The elevation in the park ranges from 5,300–6,200 feet (1,600–1,900 m) above sea level. The climate is generally humid and misty (as this is approximately the cloud level for the eastern side of Maui). The area was originally covered in dense forests of koa (Acacia koa), māmane (Sophora chrysophylla), and ʻōhiʻa lehua (Metrosideros polymorpha). When the park was established, it was devoid of trees and was subsequently reforested in the 1930s with Pine (Pinus spp.), Eucalyptus spp., tropical ash (Fraxinus uhdei), cypresses (Cupressaceae), Chinese fir (Cunninghamia lanceolata) and Coast Redwood (Sequoia sempervirens). As none of these trees are native to Maui or any of the other islands of Hawaiʻi, the park has a distinct smell to it.
The main attractions of the park are the off-roading trails, hiking trails, and hunting for Wild Boar, pheasant (Phasianus spp.), and goat. There are at least two picnic areas in the park, as well. Lastly, there is a single cabin available through the Hawaii Division of State Parks.