The Tunnel View
Sentinel Dome is hard to spot from the Glacier Point Road area, except in a few brief glimpses, but it is visible from the Tunnel View - it's the little dome poking into the sky at the rear left of this photo. The trail approaches from the right, goes around the far side of the dome, and proceeds up the left side of the dome fairly close to the horizon of this photo. The row of gray teeth below and to the left of the dome is called Sentinel Rock.