So I did the hour and a half enduro with my buddy Patrick at Lime Rock last May. Didn't go as we planned. Patrick wrote it up on his blog. My part is the first one, his is the one before. He's a much better writer than I am. Check it out, his blog is pretty cool too....http://statesofmotion.blogspot.com/
Check this email out I got from Lime Rock Park. Looks like a cool event if you're a race fan.