around here we have 50+ Masters Men 4/5, and even 60+ ... check out
The Official Website - USA Cycling and search for races in your area-- dunno where in the Ozarks you are, but this crit series in Little Rock is an example:
http://www.usacycling.org/events/get...rmit=2017-1614
you'd be a cat 5, and a lot of crits will have a 50+ race (at least around here it's like that)