These are some possible routes up to the summit of Kimtah Peak. The red route is the route I took.
Trip report here. The blue route is an option for parties not wishing to make the traverse.
See this TR for approach notes. The purple route would be used if you were interested in Cosho and Kimtah as described in
this TR. Click to view in large size so you can actually see the detail. North Cascades, WA.