In the picture above, the point in the lower left area where the blue line comes through the gap, just before it splits up into all those various routes up to the summit plateau, is the notch. The entire blue line from that level all the way up to the summit plateau (usually using the first blue line on the left) is called the Final 400, or the chute.

CaT

If future generations are to remember us with gratitude rather than contempt, we must leave them more than the miracle of technology. We must leave them a glimpse of the world as it was in the beginning, not just after we got through with it.
- Lyndon Johnson, on signing the Wilderness Act into law (1964)