At the top of the Peekaboo Loop Trail at the far west side of the trail,
just off the amphitheater rim there is a large notch cut through an east
west fin for the trail.
The trail on the north side of the fin passes right under this arch, but is
high-up on a steep wall of a cross fin and you can't step back on the trail
because of a steep drop-off.
On the south side of the notch, leave the trail and hike east along the
top of the talus at the base of the fin a fairly short distance. Go around the
end and come back on the north side to get to the cross fin.
Head right to find the 10 ft, X 5 ft. arch, best lit in the morning.
If you turn around there, you will find a smaller arch nearby.
Photo and directions by