I realized it as soon as I parked my car at the trailhead and stepped out. I mentally facepalmed myself. I had forgotten to grab my helmet. I know we used to ride bikes without helmets. Even the first mountain bikers. But nowadays I don't even cruise the side walk without a helmet. I'm definitely not riding a sick day at Left Hand without a brain bucket. At least I was by myself so I wasn't ruining anyone else's day. I accepted the fact that I wouldn't be doing any hardcore riding and resigned myself to some trail maintenance. It was still a beautiful day and I was in my favorite place, so I headed up. I thought about the judgement I would receive from other mountain bikers, but no one lectured me about head trauma. Then I stashed my bike and became a hiker anyway. The last time I rode Indy I did notice lots of loose rocks. In my thirty-plus years on a mountain I've realized that loose rocks on a trail are just as sketchy then as they are now. I've also re...