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Pink Pillbox Trail (AKA Pu'u O Hulu Trail)

 4.6 (12)

With views of mauka (mountain) and the makai (ocean), what more can you ask for...

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Point to Point

767' 234 m


102' 31 m


664' 203 m


0' 0 m



Avg Grade (11°)


Max Grade (27°)

Dogs Leashed

Features Views

Family Friendly While the hike is tough, your kids will love exploring the pillboxes and admiring the view.


This trail is also known as the Pu'u O Hulu Trail by locals. From the start of this technical trail, you are immediately hiking over increasingly larger rocks. The grade is extremely steep along most of this trail, only easing near the top. At the halfway mark up the climb, we turned around and noticed a majestic view toward Makaha—this was the perfect place to stop and enjoy the inspiring view. As we traveled further, we came across a tree growing on the side of the hill. I called it the “tree of genealogy”. Can you imagine the history this tree has seen?

As you reach your first pillbox, you’ll see an iron rod sticking out of the ground. That rod held a
WWII .30 caliber MG machine gun. Continue hiking up further to the pink pillbox (be cautious going up or down this section of the trail because of loose gravel) to enjoy a panoramic view from Ko Olina to Kaena. On a clear day you may see Mt. Ka’ala, which is the highest peak on O’ahu at 4,026 feet. The reason the pink pillbox was painted pink was to support cancer awareness.

Note: Though it may look like the trail continues on from here, it does not. The way becomes dangerous and a fall would have devastating consequences. It is not recommended to explore beyond this point.

Pu’u O Hulu (hill of Hulu), aka Pink Pillbox, was originally established on April 27, 1923 as a military fortification. Several pillboxes were made here all facing the makai (ocean). All the pillboxes were connected by tunnels, and a mess hall and kitchen were built on the other side of Hulu. The pink pillbox was armed with 7-inch MK2M4-6 Naval Guns but was later outfitted with 6-inch guns. Construction halted on May 31, 1945 (The Coast Defense Journal, August 2006 vol. 20 Issue 3).

This is definitely a hike worth taking.

Flora & Fauna

Towards the top there are a lot of flies, so stay where the trade wind can blow on you and chase the flies away!

Shared By:

Shawn Tamasaka

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  4.6 from 12 votes


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  4.6 from 12 votes
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51 Views Last Month
6,301 Since Jan 21, 2018



My daughter and I outside the Pink Pillbox. This hike was amazing and family friendly. Our group had two babies two young girls and a dog and we all loved it!
Dec 22, 2021 near Mā‘ili, HI
Half way up and we turned around to see this view.
Jan 21, 2018 near Mā‘ili, HI
Looking toward Ko Olina.
Jan 21, 2018 near Mā‘ili, HI
Awww Sweet!!
Jan 21, 2018 near Mā‘ili, HI
Another view.
Jan 21, 2018 near Mā‘ili, HI
Pu'u O Hulu aka Pink Pillbox.
Jan 21, 2018 near Mā‘ili, HI



Current Trail Conditions

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All Clear 94 days ago See History
Add Your Check-In


Jun 13, 2022
Jalon Walker
0h 27m
Mar 3, 2022
German Gomez
1.4mi — 1h 00m
Jan 13, 2022
Omar Ghaznavi
Nov 16, 2021
Spencer Imel
Jul 9, 2021
Gerald Murphy
Mar 20, 2021
Brittney Jo
Oct 28, 2020
Rob Rulison
Feb 8, 2020
Phil Herriott
1.2mi — 2h 30m