La'ie, Oahu
This group of exposed, upraised, reef-based limestone crags can be seen when driving north on Kamehameha Highway from the town of La'ie.  The numerous crags are mauka (on the mountain side) of the highway, near the former Kahuku Sugar Mill and commercial shrimp ponds.  Several widely spaced outcroppings in the area offer route potential with heights up to 50 ft.  Two sport routes were formerly bolted here, but hardware was removed in 1997.  The rock is somewhat soft, as far as limestone goes, but certainly climbable and very different from climbing on the island's a'a flow walls.  Rock features include steep route potential and unique stalactite formations. The bolting party  removed the hardware, since the ownership of the land was unknown, in order to avoid any potential situation with the landowner(s) before serious development began there.  Boulder here at your own risk, but please refrain from bolting anything until further information on access status is available.

Makakilo Quarry, Oahu
This a'a flow (pictured top left) can be seen on the mountain side of H1 while driving to and from the Waianae Coast. It is a hard a'a flow wall about 60 ft. at the highest, and lies, in part, behind the Hawaiian Waters Adventure Park in Kapolei.  Rock features include some amazingly cool-looking thin finger cracks and crimpy faces. The east side of this wall was actually the first bolted top-rope area in Oahu, and possibly all of Hawaii.  Originally developed by Terry Kerby and friends, years before development of the Mokuleia wall, all hardware was removed in the late 1980s for use at Mokuleia.  However, there is great potential here for at least 20 sport and top-rope routes, and top-rope anchors could currently be set using trees atop the wall.  There is bouldering potential here as well.  Stay away from the west side of the flow though, it has been quarried extensively and is potentially quite dangerous. Unfortunately, the land is currently under private ownership.  Perhaps in the future some agreement for access can be reached if Hawaii's climbing community is willing to get involved.

Nanakuli Ridge, Oahu
This undeveloped crag is a giant a'a lava flow similar to the Mokuleia wall.  It is 100 ft. tall in some spots and appears to be nearly as long at the base as Mokuleia.  Fisrt explored by climbers in the late 1980s, the rock is reportedly superb, and the route potential here is high.  The bad news is that access is impossible from the valley floor, and the only possible way to reach the wall is to drive up through the Makakilo Ridge housing area.  You then encounter a private and locked road leading to a cellular tower bank located on the top of the ridge.  The climbing wall is then only about a 1 hour hike from the towers.  If the climbing community can somehow secure access to the tower road, this spot could be a tremendous addition to Oahu climbing.