Hidden in the back of Manoa Valley at the base of the Ko’olau Mountains is Manoa Falls. The hike to the waterfall is about one mile, winding through flourishing rainforest including eucalyptus trees, bamboo, wild ginger and giant ferns. The hike is classified as easy and is a simple out-and-back trail. The hike terminates at the base of an approximately 100-foot tall waterfall and viewing area with seating. 

 

The trail to Manoa Falls begins at the north end of Manoa Road. There is a private parking lot that will charge a fee of $5.00, as well as provide helpful walking sticks and a trail guide. The hike to the waterfall is about a 30- to 45-minute walk. The trail is clearly marked and winds through the rainforest next to a small stream. The terrain changes from a gravel pathway with man-made wooden bridges and stairs to an uneven, rockier track as it progresses. At times the trail can be muddy if it has recently rained. 

 

The water flow of the falls is relatively narrow and drops off an almost vertical, fern-covered cliff face. The magnitude of water depends on the amount of rain and is the strongest during the rainy season, January through March. A separate trail called the Aihualama Trail, which is more advanced, continues to the left of the waterfall base and leads up the ridge of the mountains. 

 

There are a few precautions that hikers should consider before hiking to Manoa Falls. A restoration project has been in effect since October 1995. Manoa Falls is one of the most frequently visited trails in the state and therefore it is important to stay on the designated paths to avoid erosion and damage to the surrounding rainforest. An organization called Youth for Environmental Service (YES) has used recycled materials such as tugboat bumpers, cement bags and plastic lumber to help restore the trail. 

 

The trail also has a high landslide risk due to its location in the valley. On January 28, 2002, a landslide hit the base of the falls, causing 30 tons of material to crash down. The landslide was a result of heavy rain affecting the pool at the base of the waterfall and the surrounding area. Consequently, signs have been posted to designate the boundaries of the viewing area. Swimming in the pool is a safety hazard and prohibited. It is not recommended that visitors drink the water because there is a risk of leptospirosis, a bacteria carried by pigs and rodents that is common in freshwater areas of Hawaii. 

 

There is currently a controlled pig hunt that takes place on Wednesdays and Sundays. Hikers are advised not to bring pet dogs on these days to avoid unwanted encounters with the hunting dogs. 

 

It is recommended that hikers check the weather conditions before hiking, wear comfortable shoes, and bring water and insect repellant.