Below are some distance races. I did an educated guess on the Steeplechase and Gilligan's Run. Rick can chime in if this is incorrect but he used the same exact date in 2011.

April 30: Miami-Key Largo (Miami/Key Largo)
May 17-21: Florida 300 (Florida East Coast)
June 15-18: Great Texas 300 (Texas Gulf Coast)
July 30: Sandusky Steeplechase (Put-in-Bay)
August 6: Gilligan's Run (Daytona) date tentative
October 29-30: Hiram's Haul (Melbourne/Sebastian)
December 10-11: Steeplechase (Key Largo)