Hiking the Nuʻuanu Trail on Oʻahu, Hawaiʻi
Distance: 5.6 miles / 9.0 km
The Nuʻuanu Trail on the Pali side of Tantalus is more or less a connector trail to the large network of trails found throughout Tantalus. Furthermore, the Nuʻuanu Trail is often thought of as the sister hike to the ʻAihualama Trail, located on the Mānoa Valley side of the mountain.
That being said, the Nuʻuanu Trail is seldomly hiked on it’s own, as it’s often joined with the Pauoa Flats Trail to the bench or Puʻu Kōnāhuanui via Lulumahu Ridge. Be that as it may, the distance above is only the roundtrip distance on the Nuʻuanu Trail and doesn’t not include anything further.
Puʻu Kōnāhuanui (K1)
If you’re trying to hike to the summit of Puʻu Kōnāhuanui from Nuʻuanu, the total distance is 5.5 miles (8.9 km) each way, with an additional 860 ft. (262 m) of elevation gain compared to 4.1 miles (6.6 km) each way from the traditional Puʻu ʻŌhiʻa Trailhead.
Read My Separate Post: Puʻu Kōnāhuanui Ridge Trail
Nuʻuanu Trailhead Parking
Parking for the Nuʻuanu Trail is located at Judd Trailhead, off the side of Nuʻuanu Pali Drive.
That being said, never park at this trailhead with an expired registration or a safety check. HPD and towing companies have been known to target this area for cars that they can legally tow if one of these is expired.
Furthermore, consider the Judd Trailhead to be a high-crime area for petty theft, meaning you should never leave visible bags or anything valuable in your car.
Google Maps Directions: Judd Trailhead
Hiking the Nuʻuanu Trail
The Nuʻuanu Trail begins at the Judd Trailhead and remains on the Judd Trail for the first 0.5 miles (0.8 km).
Nuʻuanu Stream
Within the first 0.1 miles (0.2 km), the Judd Trail crosses the Nuʻuanu Stream.
Unless the stream is running high, there is usually a way to cross on the rocks without getting your shoes wet.
Judd Loop Trail
On the far side of the stream, you can either go left (straight) around the upper side of the loop or right on the lower, but longer, side.
Personally, I recommend going left (straight) at the split, in order to take the fastest route to the Nuʻuanu Trail junction.
Read My Separate Post: Judd Trail
These Cook Pines are some of the most beautiful sections on the entire hike, and they make for a great place to take photos when the late afternoon light is just right!
Nuʻuanu-Judd Loop Junction
After 0.5 miles (0.8 km), the Nuʻuanu Trail will split to the left.
This is where all of the uphill begins for about 850 ft. (259 m) of elevation gain to the Pauoa Flats Trail on Tantalus.
If you are interested in learning more about the full Judd Trail Loop and the Jackass Ginger Pool, I encourage you to check out my separate article using the link below.
Read My Separate Post: Judd Trail
After the first few small switchbacks in the beginning, the Nuʻuanu Trail will climb four major switchbacks to gain the upper ridge that leads up to the Pauoa Flats Trail.
The photo below is the first of four switchbacks.
Upper Ridge
After walking under the beautiful Banyan Tree in the photo above, the Nuʻuanu Trail begins the upper ridge, which is where the best views on the entire hike can be found!
This ʻŌhiʻa-Koa forest is the only part of the entire Nuʻuanu Trail that passes through a predominately native forest.
Pauoa Flats Trail
The end of the Nuʻuanu Trail is the Pauoa Flats Trail. That said, one of the popular destinations to hike to on Tantalus is the Pauoa Flats Bench, located to the left, less than a half-mile away from this junction.
If you have any interest in hiking some of the Tantalus Loop Trail or hiking to the beautiful Mānoa Cliff Restoration Area, I encourage you to use the map in the photo below or check out my separate article about the entire network of trails up on Tantalus.
Read My Separate Post: Tantalus Loop Trail
Pauoa Flats Bench (Puʻu Kōnāhuanui Ridge Trail)
As the saying goes, all Tantalus trails lead to K1.
While this is true regarding the Nuʻuanu Trail, I highly recommend reading my separate post if you’d like to learn more about hiking to the top of the Koʻolau Mountain Range.
I say this because beginning from the bottom of Nuʻuanu Valley wouldn’t be ideal, but as previously mentioned, the Nuʻuanu Trail does make for a great return hike if you’re considering Lulumahu Ridge or the Koʻolau Summit Trail (KST) up the Pali Notches to K1.
Read My Separate Post: Puʻu Kōnāhuanui Ridge Trail
Native Plants on the Nuʻuanu Trail
For the most part, the Nuʻuanu Trail is a heavily-invaded Oʻahu hike, with little to no native species below the upper ridge.
Still, there are a few to look out for, such as ʻŌhiʻa lehua, Koa, Uluhe, and Palaʻā.
If you would like to learn more about tons of native Hawaiian plants from across the islands, I encourage you to check out my separate post linked below.
Read My Separate Post: Native Hawaiian Plant Guide
