If driving, take E. Manoa Road in Manoa Valley, toward the mountain, past Manoa Marketplace to the intersection of Alani Drive Turn left, and continue for about 0.75 mi. to where Alani Drive takes a sharp right, and Alani Lane continues straight ahead. Park along Alani Drive in the neighborhood outside Alani Lane. Do not continue down Alani Lane with your vehicle. Walk down Alani Lane (it will look like a driveway), past the houses, and through the cable gate. Beyond the gate, continue on the dirt road until you get to the Forestry and Wildlife picnic shelter. Pu‘u Pia Trail is to the left of the shelter. Camping allowed at the shelter.
Continue along Alani Dr. on foot. The paved one-lane road soon turns
to dirt after passing the last house. Climb over a wire across the road.
Parallel an intermittent stream on your left. Reach a signed junction
in a clearing with a covered picnic table. Keep left on the road, which
is the Pu`u Pia Trail. (The path to the right is the Kolowalu Trail,
which ascends to Wa`ahila Ridge.) Climb gradually along the side of a
wide gulch through rose apple, paperbark, and other introduced trees.
Cross an intermittent side stream on a plank bridge. Swing left around
the back of the gulch through tall eucalyptus trees. Ignore side trails
to the left and right. Ascend gradually along the left side of Pu`u Pia
under native koa trees. Gain the ridgeline and bear left up it through
strawberry guava trees.
Reach the top of Pu`u Pia at a grassy clearing with a bench.