Fence Design
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The fence encloses approximately 59 acres of the Ka‘ena Point NAR.  The fencing corridor is approximately four meters (13 feet) wide and 622 meters (2,040 feet, approximately 2/5 mile) long. The fencing alignment largely follows a World War II-era roadbed that skirts along the bottom of the hill behind the Point, above the sand dunes. By following this track at the base of the slope, the alignment allows for enclosing the greatest area while minimizing interference with viewplanes and avoiding further disturbance to the delicate habitat.

Diagram of the fence design

A fence with a combination of features, built approximately 6.5 feet high with a rolled hood at the top, fine mesh between the fence posts, and a skirt buried underground, prevents animals from jumping, climbing, squeezing through or digging their way around the fence and into the protected area. This design has been thoroughly tested in New Zealand in coastal and forested areas, as well as in Hawai‘i on the slopes of Mauna Loa.

Access doors are incorporated at locations where the fencing crosses existing trails at both the Mokulē‘ia and Wai‘anae entrances and a third door above the Leina a ka ‘Uhane to allow access to a fishing ko‘a (shrine). To minimize the opportunity for predator incursion if doors are propped open, a double-door system is installed where both doors cannot be open at the same time. Instead, someone accessing the Reserve must wait for the first door to close before the second door may be opened. The doorway area is large enough to fit up to nine people at a time, or someone with a bicycle or fishing pole.

An example of an access door