I started clockwise from the Yacolt Burn Trailhead. The conditions were perfect, in the high 50s and low 60s with some overcast. Overall the run went very smooth but I do recommend to familiarize yourself with the route as there are a lot of intersection or wrong turns that you can make.
I spend an extra 1-2 minutes looking for directions but that's about it... If you do the route clockwise you start off with a couple miles downhill and will have to major climbs the second one topping out around mile 18, followed by a 4-5mile downhill to the end.
Hope to see more people giving this loop a good effort!