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The Hobbit or There and Back Again Chapter 2 - Roast Mutton
The dwarves and Bilbo get captured by trolls. Gandalf saves them by tricking the trolls, they turn into stone. This is where Gandalf and Thorin get their swords, and Bilbo gets his famous "Sting" from the troll's treasure.
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BRING WATER, energy foods, sunscreen, bug spray, wear a hat, and good hiking boots, shorts not recommended (path may be overgrown depending on time of year.) NOT RECOMMENDED FOR SMALL CHILDREN, due to steep slopes and sharp drop offs. Also remember your surroundings, rattle snakes, bears, and cougars may be in the area.
All 19 Chapters will take about 4-6 hours to complete (slow and steady hiking). The hike is a very steady and steep incline, you will be hiking 1632 feet uphill, and is 10 km's including return.
Please see https://coord.info/GC3GJK6 for instructions on the runes you can solve while doing this cache series to find the finale. THIS RUNE HINT is 4 feet up on a nearby tree. 
Congrats to thefamousthree on your FTF.