Welcome to the 100 Acre Wood
The cache IS at the posted coordinates.
You can sign the log anytime, but to claim a find, you need to complete the following challenge:

Welcome to the 100 Acre Wood, a forest of challenges that will let you flex your stats AND stretch your legs. Glen Alpine Valley is home to some amazing twisted and time-worn Juniper trees. They thrive in challenging terrain under challenging conditions, so it seems only fitting that they also host some challenging caches! In creating this course, I wanted to share a place I love and provide a source of inspiration and motivation... I like to have goals that require effort but that are clearly achievable, goals I know I can constantly build toward and complete. I have hiked to all of these trees in the summer and visited them all by snowshoe in the winter. These caches are all off-trail in moderate to difficult terrain... but there are plenty of rocks, ridges, terraces, and traverses that make them all accessible if you pick the right approach. However and whenever you plan to go, plan ahead and be prepared. And if you've got 100 aches at the end of the day... you're only feeling a sense of accomplishment.
Challenge Qualifications: Challenge Cache Finds
You can't have a challenge course without a challenging challenge challenge, right? While many people think Challenge caches may have Jumped the Shark a long time ago, and others find them truly Obnoxious, I have found challenge caches to be a source of inspiration and motivation. I love to sign the logs, even when I DON'T yet qualify... which gives me projects to work on and goals to accomplish. While I'm never going to bother going for a long streak of days, filling in those gaps in my Elevation grids has been among my most rewarding experiences. To qualify for this challenge, you simply need to have qualified for, visited the cache, signed the log, and logged a find on a minimum of 100 Challenge Caches. At the time of publication I have Qualified AND Signed the Log for 140 Challenge Caches. Any cache with the challenge attribute will count, no matter the difficulty... they can be old challenges grandfathered into the system or the new and improved (approved) challenges that reward positive progress all the way! Of course, though, this is no park and grab. Qualifying might be the easy part. Physically getting to this cache to sign the log could be the more challenging half of this challenge!
You can verify your totals with the checker below!

No need to share all 100 of your finds... that's easy to see in your stats, but I encourage you to share Challenge Cache experience in your log! It could be your favorite challenge, your proudest accomplishment, or even the project you are currently working on! Personally I recently finished filling in every 50 feet of elevation from sea level to over 10,000 feet!