In late summer 2012, not far from this location, it was reported by multiple people that a series of loud knocks were heard coming from the forest. From the far side of their camp, a repeat of those knocks answered. These knocks were followed by vocalizations on both sides of the camp calling out and then subsequently answered. The campers were outdoors people with years of local hunting knowledge and experience in outside activities. They clearly stated that they had never heard anything like this.
After this incident was reported, researchers went back into the area with high quality recording equipment and were able to capture more of the vocalizations, knocks, and high pitched taps.
The detailed report and multiple recordings of these vocalizations can be found here.
The approach to the cache can be done by foot or mountain bike by running upstream along the beautiful Wilson River Trail from the Tillamook Forestry Center or the Jones Creek Trailhead. The approach can be shortened by car on Cedar Creek Road. Permission granted to place cache on Tillamook State Forest lands.
The cache you are seeking is a 30 cal. ammo can. There is an unregistered geocoin for the FTF. Cache at your own risk. There have been no reports of violence by cryptid apes, but you never know.
Congratulations to Geodude2008 on the First to Find!