Below are sites that keep a "running" list of fitness events in the Tri-State area:
www.gerwc.com
www.trifind.com
www.tuxbro.com
www.roadracerunner.com
www.evansvillebicycleclub.org
www.bikeride.com
If you are looking for an "all-in-one" site for local events, check out a new site put together by Brandon Barrett, a local runner:
www.tristatefit.com
From these sites, there are links to the event pages as well as registration information.
Search and Enjoy!