- Mark Twain National Forest Notice: the Ozark Trail is blocked between Wrangler Trailhead and Victory School by damage from the recent tornado. Contact the District Ranger's Office in Poplar Bluff for the most current information. Welcome to Missouri's National Forest Employment Volunteering Roadless Area Conservation Proposal What's the Forest Service all about Why are the oak trees dying News ...www.fs.fed.us/r9/marktwain