I ran a marathon pacing interval set (5 miles on, 5 minute recovery, 4, 3, 2, 1) on the treadmill.
I haven't had what I've felt was a satisfactory workout since the November marathon in Indianapolis. This workout took care of that void.
No gels, just 96 ounces of Gatorade as fuel.
This was my fastest "long" workout since before the Indianapolis marathon (including the two marathons in between).
I also managed to break my half marathon PR by four minutes on the treadmill, even with 2 miles of recovery jogs in the first 13.11 miles.
Sometimes, you need to test what you're made of. I feel a little better now.