Swift RL 1100 Headlamp by Backcountry — This thing is great, good fit, doesn't hurt the forehead, and lights up the trail!
Emergency Bivvy with Rescue Whistle and Tinder Cord by REI — Required bivys mean business.
Mineral SPF 50 Sunscreen Face Stick by REI — UTMB Hot Weather Kit enacted? You'll probably need this. Tiny and fits easily in a pack or belt!
Clipper LB NH Compass by REI — Mandatory gear requires a compass other than that of your watch's? This is tiny AND can clip on to your watch!
Frontier Ultralight Collapsible Cup by REI — Some of those longer races require a collapsible cup for hot liquids - this comes in clutch! Great for camping too.
UltrAspire Lumen 400z 2.0 Waist Light Black by UltrAspire — The waist light - head light combo is unbeatable for night running! Light up the trail like the sun is still out!