Polipoli Spring State Recreation Area
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It covers about 10 acres of the 21,000-acre (85 km2) Kula Forest Reserve. Located at about 6,200 feet (1,900 m) above sea level, it extends through the fog belt of the mountain forests. The high-elevation climate can be cold, with nighttime temperatures below freezing. The terrain is rough and use of a four-wheel drive vehicle is recommended. 
There are four main trails. The Haleakalā Ridge Trail enters the recreation area. It features scrub, grassland, and forest habitat with cinder substrates.  The adjacent Plum Trail is planted with plum and other trees.  The Polipoli Trail, which starts within the recreation area, features various conifers.  The Redwood Trail is used for mountain biking. Visitors can view redwoods and an old ranger's cabin. 
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 pines, eucalyptus, tropical ash, cypress, China-fir, and coast redwood.
|Wikimedia Commons has media related to Polipoli Spring State Recreation Area.|
- Polipoli Spring State Recreation Area. Hawaii State Parks. Department of Land and Natural Resources.
- Haleakalā Ridge Trail. Archived 2014-01-11 at the Wayback Machine Hawaii State Parks. Department of Land and Natural Resources.
- Plum Trail. Hawaii State Parks. Department of Land and Natural Resources.
- Polipoli Trail. Hawaii State Parks. Department of Land and Natural Resources.
- Redwood Trail. Hawaii State Parks. Department of Land and Natural Resources.