Head up the JMT towards Cathedral Lakes. There are 2 sets of switchbacks on the JMT before you should start heading cross country. You can see the tip of the wall after the first time the trail flattens out, but keep going until the trail crosses the creek and heads up another set of switchbacks. Now when you can see the wall, head cross country directly toward it. The off-trail travel is easy walking and does not involve any dense trees or brush.
Oakland, CA