Found this on Tripadvisor but the directions provided were bad. It's a nice waterfall and worth the trip if you just want to get out for a day in the sun ... as long as you don't drive around lost for an hour!
Use this info (see below) and you shouldn't have any trouble. Also there's limited parking so go early and look for the path to the left through the trees. It's much easier than climbing straight down the sharp rocks.
5601 Riverside Dr, joplin, mo