This is the first noticeable boulder that you will come to as you walk along the Extensions trail as is shown in the Topo map.
The faint trail begins halfway between The Alcove and The Fishnet Boulders and will take off on your left heading north.
There seems to be only one climbable face (the West face), but the rock quality is somewhat dubious.
Perhaps it's best used only as a marker to know you're not lost.
The Extensions trail (see Beta photo) will lead you right to this rock and it will pass around the west side of it on its way towards Extensions 2 Boulder.
See the main Extensions Area page for a more detailed description on how to get to the trail that leads to this boulder.