This is a nice trail for a run or for an easy-going walk. There are a few rolling hills, but it doesn't have anything too strenuous. True to its name, Coal Creek meanders near much of the trail, which is nice plus. The Louisville section has a decent amount of shade, but once you get to the prairies in Lafayette towards Erie it is pretty exposed. The prairie dog field is fun to run through, though. Really nice view of the Flatirons in Aquarius open space going west towards Louisville. Overall, I wouldn't go out of my way for this trail, but it is nice for those who live nearby.