|Mt. Evans - mixed, couloirs
This is the couloir hidden just behind the Third Apron, South and a little West of Summit Lake. A mild half hour hike leads to 600-800 feet of 50 degree snow and a little water ice (in August anyway). A 4th class traverse exits the couloir and a 1/4 mile hike along the ridge gets you to the summit. Descend along the road or in a tourist's car. I don't think the couloir is described in any guidebooks, but it makes a good morning workout before work in the summer.
If you really need a rope, you could use pickets or a light rock rack.
From: CO & AK
Jul 1, 2013
This description sounds more like the couloir between the 2nd and 3rd Apron. The couloir to the climber's right of the 3rd Apron is not that good and consists of chossy third class terrain and doesn't fill in with snow that well down low.