The trail consists of an upper loop and a lower loop. The upper loop is where the action is. Here you'll find bamboo, banyan, and macadamia groves. The garden also houses a Japanese style tea house, stone lantern, and pavilion. There are also some beautiful lava stone platform steps. Another attraction at the garden is a large stone basin that was donated by a Japanese University. The end of the upper loop will bring you to a beautiful lookout point from where you'll be able to see Kaneohe Bay.
This is a loop trail with an optional branch to climb higher up to Hill 942 (named because it is 942' in elevation). There are numerous viewpoints looking along the trail. You can see all the way to Chainaman's Hat (and then some) to the north. To the south you can see all the way to Makapu'u. To the west you can see great views of the Koolau's, including Mt. Tauntalus. Great views also of: Kaneohe Bay, the Marine Corps Base, Kailu, and Lanikai.
The degree of difficulty will definitely ratchet up if it is wet/rainy. There are a number of steep (but short) climbs. Ropes are provided at the more steep sections. It is possible to make the ascent/descent without using the ropes.
A good turnaround point is the top of hill 942. If you are not inclined to go for the last climb, you can still get great views. To be honest, there are trees surrounding the top of Hill 942, so the views are pretty limited from up there. You'll have better views before going all the way to the top.
There are a handful of geocaches along the trail. The GPS tracks take you to to approximately the last cache (beyond Hill 942). If you want to go that far, there is a pretty steep descent from Hill 942 to get there. Keep in mind, what goes down needs to go back up...
More Info: friendshipgarden.org