2019 Big Muddy Rendezvous in Lexington Missouri Rate This Event The 8th Annual Big Muddy Rendezvous will be held on September 19-22, 2019 at the Big River Ranch in Lexington, Iowa. The rendezvous is Sanctioned by The Missouri Offhand Association and co-hosted by the Fort Osage Muzzleloaders and the Strother Freetrappers Club. Public [read more]