I’m running a 100 miler this summer and am looking for a good headlamp suggestion. What works best for you?

My go to headlamp for many years has been the Petzl NAO. I absolutely love that it is rechargeable and I don’t have to worry or think about batteries. I can plug it into any USB outlet and immediately start charging it for the next adventure. It also has ‘Reactive Lighting Technology’ meaning it will dim or brighten based on the environment, this is an incredible feature as it helps with charge-life and isn’t using power to over-light the trail. Plus, you don’t have to worry or even think about it, the light reacts on it’s own. You can over-ride this feature though with a twist of the knob and keep lighting on high setting if desired. And, the high setting is impressive. Not only have I used this headlamp out on long trail runs, I’ve also used it when the sun has set on ice climbs and I can illuminate the entire frozen waterfall when everyone else’s headlamps just aren’t cutting it. Lots of ‘ohs’ and ‘ahs’ ensue. I would recommend having at least two headlamps for a 100 mile endeavor. Not that you need two on you at all times but your crew can have the other headlamp charged and ready for a switch off during the night and begin to charge your first headlamp without having to worry about losing a charge or a dimming light. Better to change it out before it becomes an issue. The NAO looks a bit intimidating with the cord and straps but fits comfortably. For longer endeavors I’ll wear a beanie hat in the winter under my headlamp and a buff in the summer just for a softer more snug fit than just wearing it against my skin. Just makes for added comfort for long miles. Whether a 100 mile attempt or just the headlamp you keep in your pack for a setting sun, I’d definitely recommend the Petzl NAO.