The fast, friendly front half
The race opens on the rolling Olmstead Loop, fast and smooth, with an early chip mat and the first aid around mile 8. From there you work onto the Rim Trail and the Western States singletrack, cross Knickerbocker Creek near mile 7, and then drop toward the canyon. This is real runnable terrain, gentle grades, good footing, and the whole field is buzzing. It is also the single biggest pacing trap of the day.
Those smooth early miles will talk you into banking time at a pace you cannot hold once the climbing shows up. So run the front half a notch easier than feels right, keep your effort steady on the rolling stuff, and get to the back half with your legs still under you. Honestly, almost everybody who has a rough day at Way Too Cool spent it too fast before mile 20.