Today I tried running the brand-new Prairie State marathon in Libertyville, IL. It takes place along the Desplaines River trail - which is mostly crushed limestone. It started at 8am and the temperature was soon in the 80s. Between the heat, the sparse Gatorade stops, and the somewhat rolling hills, it was kicking my butt after a while, so I dropped out at about mile 18, when the marathon course conveniently went by the finish line. I could have finished with a bunch of walking, but the temptation to stop was too great!
I'm chalking it up as a fully supported training run. And I may try another marathon in a few months.
They say to keep your eyes on the prize
but sometimes it's wise to revise.