I once ran The Dipsea race in Marin County. Up nearly 700 stairs through the woods, running through the Redwoods and then down the mountain to the beach. Starts in Mill Valley & ends at Stinson Beach. Seven and a half miles I think it is.
But then I was in the seventh grade and didn't mean to run the race. Just going to join my girlfriend and her friend for the first leg but I ended up running the whole thing. Regaled in full green and white pinstripe bell bottoms and three coats tied around my waist. So good luck
You won't be the ONLY one limping.