The Blue Trail, or the South Rim Trail, is 6.7 miles long (one way). Unless you have staged a vehicle at the other end, you must turn around and come back the way you came or pick up a connector trail to go a different way. Beginning at the North Trailhead, the Blue Trail makes a steep climb up the ridge, going from an elevation of approximately 620 feet to approximately 1100 feet. Once the ascent is made, the trail follows the ridge to end at the Peavine Falls parking lot. Therefore, starting at the Peavine Falls parking lots involves minimal changes in elevation until the end of your hike.
The name of this cache is due to the fact that you have climbed to basic top of the trail; or, you are getting ready to drop down off this ridge.
You are looking for a small cylinder that could hold more than a roll of quarters. Enjoy.
If you want to do the thru hike, the Peavine Falls Lot is here: N 33° 18.155 W 086° 45.679.
The North Trailhead lot is across the paved road from here: N 33° 21.433 W 086° 42.292.