Kawai Nui Marsh is a large fishpond in the ahupuua region in Kailua. The fishpond used to be a sea about 4,000 years ago. The marsh covers an area of 830 acres. Currently, it is the largest wetland in Hawaii. It is one of the most cultivated fishpond. Archeologists often visit the area to discover archaeological evidences. There are 22 archaeological sites in the marsh area. Most of the archaeological sites can be observed when standing on the trail. Nearby the marsh, there are many heiau. Only a few ancient heiau can be found in the area. Some heiau are not yet located.
Various types of wild birds can be found at the Kawai Nui Marsh. It is estimated that the Kawai Nui Marsh is home to more than 60 species of birds and fishes. It is home to many endangered wildlife. Some of the animals you can observe at Kawai Nui Marsh include Hawaiian duck, black neck stilt and etc. You can also observe the moorhen at the marsh. If you want to explore the marsh, you can follow the trail. The trail is completely paved so it is easy to hike it. The trail runs across the marsh. You can stroll or jog on the Kawainui Marsh Trail. If you want, you can rent a bicycle and cycle around the trail. Many endangered birds can be seen in this marsh. Kawai Nui Marsh at the back of Kaha Street in Oneawa. The trail is stroller friendly so you can bring along your baby buggy. The trail is linked to the Ulupo Heaiau where much preservation work has been carried out.
The Na Pohaku o Hauwahine rock formation can be found in the area as well. The rock formation depicts the goddess of Hawaii. If you plan to hike the Kawai Nui Marsh trail, it is recommended that visit the site at 2 p.m. This is because the sun sets about 6:30 p.m. It is not good to hike at night because you can’t see well. You may get lost if you hike at night. Besides, you should watch out for the flooding of the streambeds. The marsh area is known to have red dirt. The red dirt in the marsh causes the trail to become slippery. If you want to participate in an educational tour, you can visit the Alahui Malama I Ka Lokahi organization.