The Sierra Club offers kayak rides down the Waimea River as you pick up litter along the way. You can kayak down the Hanalei River with the Sierra Club and pick up litter. The Sierra Club has located the very invasive and destructive alien plant miconia around the Wailua area. To stop miconia before it becomes a huge threat on Kauai, they have eradication activities. The volunteer workday is the 1st Saturday of each month, where they set out and kill the weeds, or occasionally maintain trails.
Illegal campers leave an incredible amount of trash in the valley.
All of this has to be double bagged, hauled down to the beach for removal by kayak to zodiac, or helicopter as funds allow. Illegal campers leave ridiculous amounts of trash at illegal campsites all over the valley. They assist State Parks in annual clean-ups which usually involves bagging and hauling the trash to the maintenance hut for removal. This effort has enabled the archeologists to map areas that were not done previously. All westside residents are automatically members.