This shot was taken from the trestle looking back onto the last 300yds of the "trail."  The overlook is that notch at the top.  Most of the difficulty is near the top but the rock-strewn valley presents its own challenges.  The horizontal cut on the middle left is where an old RR siding is located.  That siding used to hold the main tracks, which crossed Goat Canyon via a short trestle and disappeared into the tunnel pictured directly opposite the cut to the right.  That tunnel caved in sometime in the 1920's, causing the tracks to be relocated to their present right-of-way and the construction of the large trestle where the photographer is standing.