This is a small tube hanging upside down. There are 2 places to hang upside down here. The tree isn't the place that you are looking for the cache at.
ABOUT THE TRAIL:
There are generally about 50 caches along the trail. This is no power trail as many of the hides are different in type, size, difficulty and terrain. If you want to know where to park or get food or a bathroom along the trail you need to check out GC4Q1H2 (Bike Trail - Welcome to the Trail). It is loaded with valuable information. I have chosen to list it all on one cache only to help in maintaining it and not loading you up with the same way points over and over again. There is also a bookmark list that has all the caches along the trial listed.