Traci R.
Yelp
Before you do any hike, you should ALWAYS do some research. And with this hike in particular, you should map it out or have an idea of where you will be headed otherwise a short hike will turn into a wild, hours-long adventure. Let me speak from experience.
LOCATION: Head Up Tantalus. You can use the pinpoint that Yelp has but go slightly further. You will see a small area to park (can fit maybe 4 or 5 cars) next to what looks like private property. There are other locations to park as well, but be careful of where you leave your vehicle and ensure you do not make it tempting for your car to be broken into.
TRAILS: 'Ualaka'a Trail itself is very short. Approximately half a mile. You'll see a small section of bamboo forest which is nice :) Most people will continue on from this trail and head to a few others. There are so many intersecting/connecting trails and the first one you'll come across is the Makiki Valley Loop or Moleka Trail. If you're up for a long hike, take Moleka. Otherwise, I highly suggest you stick with the Makiki Valley. Let me just say, if you take the wrong one, you could end up at Manoa Falls.
We happened to do the 'Ualaka'a to Moleka to Manoa Cliff to Kalawahine to Nahuina to Makiki Valley and back to 'Ualaka'a...on accident. Easily a 6+ mile hike. There are a few lookout points of the valley, but overall it's not a big scenic hike. The trails are pretty shaded and relatively flat so bringing kids and pets aren't too bad. A few spots on the Makiki Valley Trail can be a little wet so be careful. It's quite odd that a few trails spit you back out onto the main road and sometimes it's hard to find where the next trail head starts. To connect back with Nahuina when it punts you out on the road, go right down the road and you'll see it on your left. As far as the other connecting trails, usually if you take the left, you'll be headed onto the loop that I mentioned above.
I would recommend downloading the link below and keeping it with you while you hike:
http://www.dlnr.hawaii.gov/recreation/files/2013/09/Oahu-Hiking-Map_HonoluluMaukaTrailsSystem.pdf
Alright, now the kicker. You want a good view? You don't even need to hike. You can drive up to it. Pu'u 'Ualaka'a State Park. Breathtaking views from Diamond Head to Pearl Harbor. You can have a picnic there if you like too!
TIPS:
1) Research your trails on Tantalus and download the link above.
2) Bring mosquito repellent. Bugs everywhere.
3) Lots of water in case you take the wrong trail and you end up on a longer one. While you're at it, pack some snacks.
4) Bring a camera and some good company.
5) Smile and enjoy the hike!