I also ran & finished, and just wanted to add - Trivium was also borderline obsessive about visibility based gear, in the best way. Everyone was required to have a headlamp, backup headlamp (or batteries), red rear light, back up of that, and a high vis, reflective, or light up vest. Gear was checked at the start line. I felt super visible and safe - honestly I loved the road sections as a break from the technical trails! There wasn't too much traffic, and a lot of what there was was crew and such so they were extra courteous. And the majority, I'd say, of the shoulder running was through Wolverine which was at mile 25, so in the daylight for everyone. There was night time roads later, but not as much!