The posted coords is the trailhead where you will begin! You will need to have a UV light in order to find the cache.
You will be required to bring a flashlight to locate the way. You're looking for firetacks (reflective trail markers). Simply locate a marker, walk up to it and search for the next one and so on. When you arrive to a tree with three firetacks, be sure to take a good look around.
Don't have a UV light? Turn the light on your smartphone into one! Click Me