Your quest is to find both of the Two Towers traditional caches ; Shelob's Lair GC8EE9 and Flotsam and Jetsam GC8EE3 gathering partial coordinates from each which will lead you to the final cache Helm's Deep GC8EDC which is a 30mm ammo cache.
Here we find Merry and Pippin resting after their long ordeal with the Orcs and after the Ents and Hourns have taken control of Isingard by demolishing the walls and diverting the mighty river Isen to flood the evil machines of Saruman. Depending upon the time of your visit you may hear the rushing waters of the Isen, and if you travel a little further north you'll see lots of flotsam and jetsam.
You can mountain bike this series, but you will have to leave your bike at least once to walk up to 200 feet as the crow flies, so you may want to just hike it.
Recommended parking: N 41 37.036 / W 87 48.101
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