We had attempted Mt Yale previously from the old Denny Gulch trail, to be stopped short of the summit by a nasty thunderstorm. This time, however, we climbed it with a group from the CMC during one of their Instate Outings, and from the Denny Creek trailhead. It was a fun climb, a beautiful day, and everyone made it including one lady who was skittish and hesitant at the very top.
I have climbed Yale in both summer and winter from the Denny Creek trailhead. Summer climbs are easy but winter climbs are more demanding, be in good shape!