TL;DR: This is a cache just like the caches Cowboy Nate has already place along the pathway
Many of my first friends in Michigan are people I met through the Home Brew Digest (HBD) and Ann Arbor Brewers Guild. Jeff is one of them. Jeff and I have an interesting homebrew history starting with the HBD.
Jeff used to answer and comment on a lot of homebrew topics on the HBD. He takes more of a storyteller's approach than most. Jeff quite often asked people to post their location so HBDers could recommend clubs, homebrew shops, or offer local insights, perhaps on local water chemistry. With these calls for location, Jeff became known as the center of homebrewing. I took it the next step, Rennerian Coordinates with Jeff at [0,0]. Many HBDers from all over the world would sign their posts similar to this:
Jason Henning
Whitmore Lake, MI
[9 mi, 18°] Rennerian
Jeff was homebrewing long before most and he was geocaching long before most as well. Jeff and Nancy placed two of Michigan's 25 oldest caches, Old Lindley Road and Sackrider Hill. The background picture of this cache page is Jeff holding the homebrew yeast tube geocache just before placing it.
So this is a tribute cache to Jeff and our shared hobbies.