Really nice trail that is convenient to St. Louis (and close to the burbs). I went trail running today, in the midst of hot and humid Missouri summer. The trail was perfectly shady with off-shoots to view the river from the bluffs. I ran the 5.3ish Clark trail and only had to walk partly up one ascent so the hills were reasonable for an experienced runner and a nice work out. The trail narrows near the fork between the two trails but was easy to navigate. I found the signage acceptable knowing to keep an eye out for trail markers. The trail was not terribly busy mid-Saturday morning but the parking lot was full. Highly recommend!